Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	ORION ENERGY SYSTEMS, INC.
Entity Central Index Key	0001409375
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--03-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		29,421,892

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017
Assets
Cash and cash equivalents	$ 7,835	$ 9,424	$ 8,485	$ 17,307
Accounts receivable, net	7,183	8,736
Revenue earned but not billed	1,055	0
Inventories, net	8,597	7,826
Deferred contract costs	0	1,000
Prepaid expenses and other current assets	408	2,467
Total current assets	25,078	29,453
Property and equipment, net	12,571	12,894
Other intangible assets, net	2,747	2,868
Other long-term assets	105	110
Total assets	40,501	45,325
Liabilities and Shareholders’ Equity
Accounts payable	10,215	11,675
Accrued expenses and other	4,909	4,171
Deferred revenue, current	89	499
Current maturities of long-term debt	80	79
Total current liabilities	15,293	16,424
Revolving credit facility	2,302	3,908
Long-term debt, less current maturities	85	105
Deferred revenue, long-term	847	940
Other long-term liabilities	615	524
Total liabilities	19,142	21,901
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	0	0
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	0	0
Additional paid-in capital	155,231	155,003
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	(36,087)	(36,085)
Retained deficit	(97,785)	(95,494)
Total shareholders’ equity	21,359	23,424
Total liabilities and shareholders’ equity	$ 40,501	$ 45,325

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2018	Mar. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	30,000,000	30,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	38,838,329	38,384,575
Common stock, shares outstanding (in shares)	29,403,485	28,953,183
Treasury stock (in shares)	9,434,844	9,431,392

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Revenues	$ 13,822,000	$ 12,558,000
Cost of revenue	10,366,000	9,847,000
Gross profit	3,456,000	2,711,000
Operating expenses:
General and administrative	3,076,000	5,335,000
Sales and marketing	2,578,000	3,354,000
Research and development	405,000	524,000
Total operating expenses	6,059,000	9,213,000
Loss from operations	(2,603,000)	(6,502,000)
Other income (expense):
Other income	19,000	0
Interest expense	(89,000)	(67,000)
Interest income	3,000	5,000
Total other expense	(67,000)	(62,000)
Loss before income tax	(2,670,000)	(6,564,000)
Income tax expense	22,000	0
Net loss	$ (2,692,000)	$ (6,564,000)
Basic net loss per share attributable to common shareholders (in dollars per share)	$ (0.09)	$ (0.23)
Weighted-average common shares outstanding (in shares)	29,070,193	28,455,434
Diluted net loss per share (in dollars per share)	$ (0.09)	$ (0.23)
Weighted-average common shares and share equivalents outstanding (in shares)	29,070,193	28,455,434
Product revenue
Revenues	$ 12,808,000	$ 11,781,000
Cost of revenue	9,724,000	8,813,000
Service revenue
Revenues	1,014,000	777,000
Cost of revenue	$ 642,000	$ 1,034,000

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net loss	$ (2,692)	$ (6,564)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	347	353
Amortization	121	162
Stock-based compensation	228	320
Provision for inventory reserves	17	130
Provision for bad debts	82	33
Other	3	12
Changes in operating assets and liabilities:
Accounts receivable, current and long-term	1,756	2,103
Revenue earned but not billed	1,300	0
Inventories	(102)	1,196
Deferred contract costs	0	(770)
Prepaid expenses and other assets	150	(163)
Accounts payable	(575)	(2,028)
Accrued expenses and other	(553)	(743)
Deferred revenue, current and long-term	(21)	204
Net cash provided by (used in) operating activities	61	(5,755)
Investing activities
Purchases of property and equipment	(23)	(204)
Additions to patents and licenses	0	(20)
Net cash used in investing activities	(23)	(224)
Financing activities
Payment of long-term debt and capital leases	(19)	(67)
Proceeds from revolving credit facility	17,188	16,307
Payment of revolving credit facility	(18,794)	(19,083)
Payments to settle employee tax withholdings on stock-based compensation	(3)	0
Net proceeds from employee equity exercises	1	0
Net cash used in financing activities	(1,627)	(2,843)
Net decrease in cash and cash equivalents	(1,589)	(8,822)
Cash and cash equivalents at beginning of period	9,424	17,307
Cash and cash equivalents at end of period	$ 7,835	$ 8,485

DESCRIPTION OF BUSINESS	3 Months Ended
DESCRIPTION OF BUSINESS	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Organization Orion includes Orion Energy Systems, Inc., a Wisconsin corporation, and all consolidated subsidiaries. Orion is a developer, manufacturer and seller of lighting and energy management systems to commercial and industrial businesses, and federal and local governments, predominantly in North America. Orion’s corporate offices and leased primary manufacturing operations are located in Manitowoc, Wisconsin. Orion leases office space in Jacksonville, Florida. Orion had leased office space in Chicago, Illinois, and Houston, Texas, but as of June 30, 2018, Orion had vacated these locations. Orion also leases warehouse space in Manitowoc, Wisconsin. During fiscal 2018, Orion had leased warehouse space in Augusta, Georgia, but as of March 31, 2018, Orion had vacated this storage location.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Jun. 30, 2018
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The Condensed Consolidated Financial Statements include the accounts of Orion Energy Systems, Inc. and its wholly-owned subsidiaries. Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements of Orion have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair presentation have been included. Interim results are not necessarily indicative of results that may be expected for the fiscal year ending March 31, 2019 or other interim periods. The Condensed Consolidated Balance Sheet at March 31, 2018 has been derived from the audited consolidated financial statements at that date but does not include all of the information required by GAAP for complete financial statements. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in Orion’s Annual Report on Form 10-K for the fiscal year ended March 31, 2018 filed with the Securities and Exchange Commission on June 13, 2018. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during that reporting period. Areas that require the use of significant management estimates include revenue recognition, inventory obsolescence and allowance for doubtful accounts, accruals for warranty and loss contingencies, income taxes, impairment analyses, and certain equity transactions. Accordingly, actual results could differ from those estimates. Concentration of Credit Risk and Other Risks and Uncertainties Orion's cash is deposited with two financial institutions. At times, deposits in these institutions exceed the amount of insurance provided on such deposits. Orion has not experienced any losses in such accounts and believes that it is not exposed to any significant financial institution viability risk on these balances. Orion purchases components necessary for its lighting products, including ballasts, lamps and LED components, from multiple suppliers. For the three months ended June 30, 2018, one supplier accounted for 11.4% of total cost of revenue. For the three months ended June 30, 2017, no supplier accounted for more than 10% of total cost of revenue. For the three months ended June 30, 2018, no customer accounted for more than 10.0% of total revenue. For the three months ended June 30, 2017, one customer accounted for 16.2% of total revenue. As of June 30, 2018, no customer accounted for more than 10% of Accounts receivable. As of March 31, 2018, one customer accounted for 13.2% of Accounts receivable. Recent Accounting Pronouncements Issued: Not Yet Adopted In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, "Leases" (Subtopic 842). The pronouncement, and subsequent amendments, which is included in the Accounting Standards Codification as Subtopic 842 (“ASC 842”), requires that lessees recognize right-of-use assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and disclose additional quantitative and qualitative information about leasing arrangements. Under ASU 842, leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition. Similarly, lessors will be required to classify leases as sales-type, finance or operating leases, with classification affecting the pattern of income recognition. Classification for both lessees and lessors will be based on an assessment of whether risks and rewards, as well as substantive control, have been transferred through the lease contract. ASU 842 also provides guidance on the presentation of the effects of leases in the income statement and statement of cash flows. This guidance will be effective for Orion on April 1, 2019. Early adoption of the standard is permitted and a modified retrospective transition approach is required for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Orion has not yet completed its review of the full provisions of this standard against its outstanding lease arrangements and is in the process of quantifying the lease liability and related right of use asset which will be recorded to its consolidated balance sheets upon adoption of the standard. In addition, management continues to assess the impact of adoption of this standard on its consolidated statements of operations, cash flows, and the related footnote disclosures. Recently Adopted Standards On April 1, 2018, Orion adopted ASU 2014-09 and subsequent amendments, which is included in the Accounting Standards Codification as "Revenue from Contracts with Customers" (Topic 606) (“ASC 606”) and Sub-Topic 340-40 (“ASC 340-40”), using the modified retrospective approach. ASC 606 supersedes the revenue recognition requirements in “Revenue Recognition” (Topic 605) ("ASC 605") and provides guidance on the accounting for other assets and deferred costs associated with contracts with customers. ASC 606 requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASC 340-40 limits the circumstances that an entity can recognize an asset from the costs incurred to obtain or fulfill a contract that are not subject to the guidance in other portions in the Accounting Standards Codification, such as those related to inventory. The provisions of ASC 606 and ASC 340-40 require entities to use more judgments and estimates than under previous guidance when allocating the total consideration in a contract to the individual promises to customers (“performance obligations”) and determining when a performance obligation has been satisfied and revenue can be recognized. The adoption of ASC 606 did not have a material effect on Orion's financial statements. Orion has updated its processes and controls necessary for implementing this standard, including the increased disclosure requirements. In August 2016, the FASB issued ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments," which provided clarification and additional guidance as to the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. This ASU provided guidance as to the classification of a number of transactions including: contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, and distributions received from equity method investees. The new standard was effective for Orion in the first quarter of fiscal 2019 and has been applied through retrospective adjustment to all periods presented. The adoption of this standard did not have a material impact on Orion’s consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, “Compensation-Stock Compensation: Scope of Modification Accounting” which provides guidance about which changes to the terms or conditions of a share-based payment award would require an entity to apply modification accounting. The provisions of this standard were effective for Orion beginning on April 1, 2018. The adoption of this standard did not have a material impact on Orion’s consolidated financial statements.

REVENUE (Notes)

3 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

REVENUE

Changes in Accounting Policies

Orion adopted ASC 606 and ASC 340-40 (the “new standards”) as of April 1, 2018 for contracts with customers that were not fully complete as of April 1, 2018 using the modified retrospective transition method. The cumulative effect of initially applying the new standards was recorded as an immaterial adjustment to the opening balance of retained deficit within Orion’s condensed consolidated statement of shareholders’ equity.

The new standards are applied separately for each contract between Orion and a customer. While the impact of the new standards vary for each contract based on its specific terms, in general, the new standards result in Orion (a) delaying the recognition of some of its Product revenue from the point of shipment until a later date during the installation period, (b) recording Service revenue associated with installing lighting fixtures as such fixtures are installed instead of recording all Services revenue at the completion of the installation, and (c) recording costs associated with installing lighting fixtures as they are incurred instead of deferring such costs and recognizing them at the time Service revenue was recorded.

The adoption of the new standards also resulted in reclassifications (a) between Product revenue and Service revenue, and between Cost of service revenue, and Sales and marketing expenses in Orion’s Condensed Consolidated Statement of Operations, and (b) between Accounts receivable, net, Revenue earned but not billed, Inventories, net, Deferred contract costs, Prepaid expenses and other current assets, Accounts payable, Accrued expenses and other, Deferred revenue, current, Deferred revenue, long-term, and Other long-term liabilities in Orion’s Condensed Consolidated Balance Sheet.

For all adjustments and changes as a result of adopting the new standards for the current period, refer to the section “Impacts on Financial Statements” below. In accordance with the modified retrospective transition method, the historical information within the financial statements has not been restated and continues to be reported under the accounting standard in effect for those periods. As a result, Orion has disclosed the accounting policies in effect prior to April 1, 2018, as well as the policies applied starting April 1, 2018.

Revenue Recognition

Periods prior to April 1, 2018

Revenue is recognized in accordance with ASC 605 when the following criteria are met:


1.	persuasive evidence of an arrangement exists;


2.	delivery has occurred and title has passed to the customer;


3.	the sales price is fixed and determinable and no further obligation exists; and


4.	collectability is reasonably assured.

Revenue is recorded net of estimated provisions for returns, early payment discounts and rebates and other consideration paid to Orion’s customers. Revenues are presented net of sales tax and other sales related taxes.

Deferred contract costs consist primarily of the costs of products delivered, and services performed, that are subject to additional performance obligations or customer acceptance. These Deferred contract costs are expensed at the time the related revenue is recognized.

Deferred revenue relates to advance customer billings and investment tax grants received related to Power Purchase Agreement contracts still outstanding related to Orion’s legacy solar business.

Period Commencing April 1, 2018

General Information

Orion generates revenues primarily by selling commercial lighting fixtures and components and by installing these fixtures in its customer’s facilities. Orion recognizes revenue in accordance with the guidance in ASC 606 when control of the goods or services being provided (which Orion refers to as a performance obligation) is transferred to a customer at an amount that reflects the consideration that management expects to receive in exchange for those goods or services. Prices are generally fixed at the time of order confirmation. The amount of expected consideration includes estimated deductions and early payment discounts calculated based on historical experience, customer rebates based on agreed upon terms applied to actual and projected sales levels over the rebate period, and any amounts paid to customers in conjunction with fulfilling a performance obligation.

If there are multiple performance obligations in a single contract, the contract’s total sales price is allocated to each individual performance obligation based on their relative standalone selling price. A performance obligation’s standalone selling price is the price at which Orion would sell a promised good or service separately to a customer. Orion uses an observable price to determine the stand-alone selling price for separate performance obligations or a cost-plus margin approach when one is not available. The cost-plus margin approach is used to determine the stand-alone selling price for the installation performance obligation and is based on average historical installation margin.

Revenue derived from customer contracts which include only performance obligation(s) for lighting fixtures and components is classified as Product revenue in the Condensed Consolidated Statements of Operations. The revenue for these transactions are recorded at the point in time when management believes that the customer obtains control of the products, generally either upon shipment or upon delivery to the customer’s facility. This point in time is determined separately for each contract and requires judgment by management of the contract terms and the specific facts and circumstances concerning the transaction.

Revenue from a customer contract which includes both the sale of fixtures and the installation of such fixtures (which Orion refers to as a turnkey project) is allocated between each lighting fixture and the installation performance obligation based on relative standalone selling prices.

Revenue from turnkey projects that is allocated to the sale of the lighting fixtures is recorded at the point in time when management believes the customer obtains control of the product(s) and is reflected in Product revenue. This point in time is determined separately for each customer contract based upon the terms of the contract and the nature and extent of Orion’s control of the light fixtures during the installation. Product revenue associated with turnkey projects can be recorded (a) upon shipment or delivery, (b) subsequent to shipment or delivery and upon customer payments for the light fixtures, (c) when an individual light fixture is installed and working correctly, or (d) when the customer acknowledges that the entire installation project is substantially complete. Determining the point in time when a customer obtains control of the lighting fixtures in a turnkey project can be a complex judgment and is applied separately for each individual light fixture included in a contract. In making this judgment, management considers the timing of factors including, but not limited to, those detailed below:


•	when there is a legal transfer of ownership;


•	when the customer obtains physical possession of the products;


•	when the customer starts to receive the benefit of the products;


•	the amount and duration of physical control that Orion maintains on the products after they are shipped to, and received at, the customer’s facility;


•	whether Orion is required to maintain insurance on the lighting fixtures when they are in transit and after they are delivered to the customer’s facility;


•	when each light fixture is physically installed and working correctly;


•	when the customer formally accepts the product; and


•	when Orion receives payment from the customer for the light fixtures.

Revenue from turnkey projects that is allocated to the single installation performance obligation is reflected in Service revenue. Service revenue is recorded over-time as Orion fulfills its obligation to install the light fixtures. Orion measures its performance toward fulfilling its performance obligations for installations using an output method that calculates the number of light fixtures completely installed as of the measurement date in comparison to the total number of light fixtures to be installed under the contract.

Most products are manufactured in accordance with Orion’s standard specifications. However, some products are manufactured to a customer’s specific requirements with no alternative use to Orion. In such cases, and when Orion has an enforceable right to payment, Product revenue is recorded on an over-time basis measured using an input methodology that calculates the costs incurred to date as compared to total expected costs. There was no over-time revenue related to custom products recognized in the three months ended June 30. 2018.

Orion also records revenue in conjunction with several limited Power Purchase Agreement (“PPA”) contracts still outstanding. Those PPA’s outstanding are supply side agreements for the generation of electricity. The last PPA contact expires in 2031. Revenue associated with the sale of energy generated by the solar facilities under these PPA contracts is in the scope of ASC 606. Revenues are recognized over-time and are equal to the amount billed to the customer which is calculated by applying the fixed rate designated in contract to the variable amount of electricity generated each month. This approach is in accordance with the “right to invoice” practical expedient provided for in ASC 606. Orion also recognizes revenue upon the sale to third parties of tax credits received from operating the solar facilities and from amortizing a grant received from the Federal government during the period starting when the power generating facilities were constructed until the expiration of the PPA contracts; these revenues are not derived from contracts with customers and therefore not under the scope of ASC 606.

When shipping and handling activities are performed after a customer obtains control of the product, Orion has elected to treat shipping and handling costs as an activity necessary to fulfill the performance obligation to transfer product to the customer and not as a separate performance obligation. Any shipping and handling costs charged to customers are recorded in Product revenue. Shipping and handling costs are accrued and included in Cost of product revenue.

See Note 9, Accrued Expenses and Other for discussion of Orion’s accounting for the warranty it provides to customers for its products and services.

Sales taxes collected from customers and remitted to governmental authorities are accounted for on a net (excluded from revenues) basis.

Contract Fulfillment Costs

Costs associated with product sales are accumulated in inventory as the fixtures are manufactured and are transferred to Cost of product revenue at the time revenue is recorded. See Note 5, Inventories, Net. Costs associated with installation sales are expensed as incurred.

Disaggregation of Revenue

Orion’s Product revenue includes revenue from contracts with customers accounted for under the scope of ASC 606 and revenue which is accounted for under other guidance. For the three months ended June 30, 2018, Product revenue included $0.7 million derived from sales-type leases for light fixtures, $30,875 derived from the sale of tax credits generated from Orion’s legacy operation for distributing solar energy, and $18,889 derived from the amortization of federal grants received in 2010 and 2011 as reimbursement for a portion of the costs to construct the legacy solar facilities which are not under the scope of ASC 606. All remaining Product revenue, and all Service revenue, are derived from contracts with customers as defined in ASC 606.

The primary end users of Orion’s lighting products and services are (a) the federal government, and (b) commercial or industrial companies.

The federal government obtains Orion products and services primarily through turnkey project sales that Orion makes to a select group of contractors who focus on the federal government. Revenues associated with government end users are primarily included in the Orion Engineered Systems Division segment.

Commercial or industrial end users obtain Orion products and services through turnkey project sales or by purchasing products either direct from Orion or through distributors or energy service companies ("ESCOs"). Revenues associated with commercial and industrial end users therefore are included within each of Orion’s segments, dependent on the sales channel.

See Footnote 17, Segments, for additional discussion concerning Orion’s reportable segments.

The following table provides detail of Orion’s total revenues for the three months ended June 30, 2018 (dollars in thousands):



	Product		Services		Total
Revenue from contracts with customers:
Lighting revenues, by end user
Federal government	$	97	$	—	$	97
Commercial and industrial	11,901		1,014		12,915
Total lighting	11,998		1,014		13,012
Solar energy related revenues	20		—		20
Total revenues from contracts with customers	12,018		1,014		13,032
Revenue accounted for under other guidance	790		—		790
Total revenue	$	12,808	$	1,014	$	13,822

Cash Flow Considerations

Customer payments for material only orders are due shortly after shipment.

Turnkey projects where the end user is the federal government typically span a three to six-month period. The contracts for these sales often provide for monthly progress payments equal to ninety percent (90%) of the value provided by Orion during the month.

Turnkey projects where the end user is a commercial or industrial company typically spans between two weeks and three months. Customer payment requirements for these projects vary by contract. Some contracts provide for customer payments for products and services as they are delivered, other contracts specify that the customer will pay for the project in its entirety upon completion of the installation.

Orion provides long term financing to one customer who frequently engages Orion in large turnkey projects that span between three and nine months. The customer executes an agreement providing for monthly payments of the contract price, plus interest, over a five-year period. The total transaction price in these contracts is allocated between product and services in the same manner as all other turnkey projects. The portion of the transaction associated with the installation is accounted for consistently with all other installation related performance obligations. The portion of the transaction associated with the sale of the multiple individual light fixtures is accounted for as sales-type leases in accordance with ASC 840, "Leases". Revenues associated with the sales-type leases are included in Product revenue and recorded for each fixture separately based on the customer’s monthly acknowledgment that specified fixtures have been installed and are operating as specified.

The payments associated with these transactions that are due during the twelve months subsequent to June 30, 2018 are included in Accounts receivable,net in Orion’s Condensed Consolidated Balance Sheet. The remaining amounts due that are associated with these transactions are included in Other long-term assets in Orion’s Condensed Consolidated Balance Sheet.

The customer’s monthly payment obligation commences after completion of the turnkey project. Orion generally sells the receivable from the customer to an independent financial institution either during, or shortly after completion of, the installation period. Upon execution of the receivables purchase / sales agreement, all amounts due from the customer are included in the caption Revenues earned but not billed on Orion’s Condensed Consolidated Balance sheet until cash is received from the financial institution. The financial institution releases funds to Orion based on the customer’s monthly acknowledgment of the progress Orion has achieved in fulfilling its installation obligation. Orion provides the progress certifications to the financial institution one month in arrears.

The total amount received from the sales of these receivables during the three months ended June 30, 2018 was $2.0 million. Orion’s losses on these sales aggregated $54,046 and is included in Interest expense in the Condensed Consolidated Statement of Operations.

Practical Expedients and Exemptions

Orion expenses sales commissions when incurred because the amortization period is one year or less. These costs are recorded within Sales and marketing expense. There are no other capitalizable costs associated with obtaining contracts with customers.

Orion’s performance obligations related to lighting fixtures typically do not exceed nine months in duration. As a result, Orion has elected the practical expedient that provides an exemption of the disclosure requirements regarding information about value assigned to remaining performance obligations on contracts that have original expected durations of one year or less.

Orion has also adopted the practical expedient that provides an exemption of the disclosure requirement of the value assigned to performance obligations associated with contracts that were not complete as of April 1, 2018.

Orion also elected the practical expedient that permits companies to not disclose quantitative information about the future revenue when revenue is recognized as invoices are issued to customers for services performed.

Other than the turnkey projects which result in sales-type leases discussed above, Orion generally receives full payment for satisfied performance obligations in less than one year. Accordingly, Orion does not adjust revenues for the impact of any potential significant financing component as permitted by the practical expedients provided in ASC 606.

Contract Balances

A receivable is recognized when Orion has an enforceable right to payment in accordance with contract terms and an invoice has been issued to the customer. Payment terms on invoiced amounts are typically 30 days from the invoice date.

Revenue earned but not billed represents revenue that has been recognized in advance of billing the customer, which is a common practice in Orion turnkey contracts. Once Orion has an unconditional right to consideration under a turnkey contract, Orion typically bills the customer accordingly and reclassifies the amount to Accounts receivable, net. Revenue earned but not billed as of April 1, 2018 and June 30, 2018 includes $0.6 million and $0.1 million, respectively, which was not derived from contracts with customers and therefore not classified as a contract asset as defined by the new standards.

Deferred revenue, current includes $13,425 of contract liabilities which represents consideration received from customers prior to the point that Orion has fulfilled the promises included in a performance obligation and recorded revenue.

Deferred revenue, long-term consists of the unamortized portion of the funds received from the Federal government in 2010 and 2011 as reimbursement for the costs to build the two facilities related to the PPAs. As the transaction is not considered a contract with a customer, this value is not a contract liability as defined by the new standards.

The following chart shows the balance of Orion’s receivables arising from contracts with customers, contract assets and contract liabilities as of April 1, 2018, after the adoption of the new standards, and as of June 30, 2018 (dollars in thousands).



	April 1, 2018		June 30, 2018
Accounts receivable, net	$	9,020	$	7,183
Contract assets	$	1,773	$	960
Contract liabilities	$	13	$	13

There were no significant changes in the contract assets outside of standard reclassifications to Accounts receivable, net upon billing. There were no changes to contract liabilities.

Impact on Financial Statements

ORION ENERGY SYSTEMS, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share amounts)



	As Reported June 30, 2018			Adjustments			Balances without application of ASC 606
Assets
Cash and cash equivalents	$	7,835		$	—		$	7,835
Accounts receivable, net	7,183			(133		)	7,050
Revenue earned but not billed	1,055			(1,055		)	—
Inventories, net	8,597			(115		)	8,482
Deferred contract costs	—			397			397
Prepaid expenses and other current assets	408			636			1,044
Total current assets	25,078			(270		)	24,808
Property and equipment, net	12,571			—			12,571
Other intangible assets, net	2,747			—			2,747
Other long-term assets	105			—			105
Total assets	$	40,501		$	(270	)	$	40,231
Liabilities and Shareholders’ Equity
Accounts payable	$	10,215		$	997		$	11,212
Accrued expenses and other	4,909			(1,152		)	3,757
Deferred revenue, current	89			167			256
Current maturities of long-term debt	80			—			80
Total current liabilities	15,293			12			15,305
Revolving credit facility	2,302			—			2,302
Long-term debt, less current maturities	85			—			85
Deferred revenue, long-term	847			82			929
Other long-term liabilities	615			(82		)	533
Total liabilities	19,142			12			19,154
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	—			—			—
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	—			—			—
Additional paid-in capital	155,231			—			155,231
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	(36,087		)	—			(36,087		)
Retained deficit	(97,785		)	(282		)	(98,067		)
Total shareholders’ equity	21,359			(282		)	21,077
Total liabilities and shareholders’ equity	$	40,501		$	(270	)	$	40,231

ORION ENERGY SYSTEMS, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share amounts)



	Three Months Ended June 30, 2018
	As Reported			Adjustments			Balances without application of ASC 606
Product revenue	$	12,808		$	553		$	13,361
Service revenue	1,014			(725		)	289
Total revenue	13,822			(172		)	13,650
Cost of product revenue	9,724			1			9,725
Cost of service revenue	642			(421		)	221
Total cost of revenue	10,366			(420		)	9,946
Gross profit	3,456			248			3,704
Operating expenses:
General and administrative	3,076			—			3,076
Sales and marketing	2,578			256			2,834
Research and development	405			—			405
Total operating expenses	6,059			256			6,315
Loss from operations	(2,603		)	(8		)	(2,611		)
Other income (expense):
Other income	19			—			19
Interest expense	(89		)	(2		)	(91		)
Interest income	3			—			3
Total other expense	(67		)	(2		)	(69		)
Loss before income tax	(2,670		)	(10		)	(2,680		)
Income tax expense	22			—			22
Net loss	$	(2,692	)	$	(10	)	$	(2,702	)
Basic net loss per share attributable to common shareholders	$	(0.09	)	$	0.00		$	(0.09	)
Weighted-average common shares outstanding	29,070,193			—			29,070,193
Diluted net loss per share	$	(0.09	)	$	0.00		$	(0.09	)
Weighted-average common shares and share equivalents outstanding	29,070,193			—			29,070,193

ORION ENERGY SYSTEMS, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)



	Three Months Ended June 30, 2018
	As Reported			Adjustments			Balances without application of ASC 606
Operating activities
Net loss	$	(2,692	)	$	(10	)	$	(2,702	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	347			—			347
Amortization	121			—			121
Stock-based compensation	228			—			228
Provision for inventory reserves	17			—			17
Provision for bad debts	82			—			82
Other	3			—			3
Changes in operating assets and liabilities:
Accounts receivable, current and long-term	1,756			(151		)	1,605
Revenue earned but not billed	1,300			(1,300		)	—
Inventories	(102		)	(571		)	(673		)
Deferred contract costs	—			597			597
Prepaid expenses and other assets	150			1,273			1,423
Accounts payable	(575		)	112			(463		)
Accrued expenses and other	(553		)	147			(406		)
Deferred revenue, current and long-term	(21		)	(97		)	(118		)
Net cash (used in) provided by operating activities	61			—			61
Investing activities
Purchases of property and equipment	(23		)	—			(23		)
Additions to patents and licenses	—			—			—
Proceeds from sales of property, plant and equipment	—			—			—
Net cash used in investing activities	(23		)	—			(23		)
Financing activities
Payment of long-term debt and capital leases	(19		)	—			(19		)
Proceeds from revolving credit facility	17,188			—			17,188
Payment of revolving credit facility	(18,794		)	—			(18,794		)
Payments to settle employee tax withholdings on stock-based compensation	(3		)	—			(3		)
Net proceeds from employee equity exercises	1			—			1
Net cash used in financing activities	(1,627		)	—			(1,627		)
Net decrease in cash and cash equivalents	(1,589		)	—			(1,589		)
Cash and cash equivalents at beginning of period	9,424			—			9,424
Cash and cash equivalents at end of period	$	7,835		$	—		$	7,835

ACCOUNTS RECEIVABLE, NET

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

ACCOUNTS RECEIVABLE, NET

As of June 30, 2018 and March 31, 2018, Orion's Accounts receivable and Allowance for doubtful accounts balances were as follows (dollars in thousands):



	June 30, 2018			March 31, 2018
Accounts receivable, gross	$	7,416		$	8,886
Allowance for doubtful accounts	(233		)	(150		)
Accounts receivable, net	$	7,183		$	8,736

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

INVENTORIES, NET

3 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

INVENTORIES, NET

As of June 30, 2018, and March 31, 2018, Orion's Inventory balances were as follows (dollars in thousands):



	Cost		Reserve			Net
As of June 30, 2018
Raw materials and components	$	6,922	$	(1,335	)	$	5,587
Work in process	1,053		(310		)	743
Finished goods	3,818		(1,551		)	2,267
Total	$	11,793	$	(3,196	)	$	8,597

As of March 31, 2018
Raw materials and components	$	6,073	$	(1,363	)	$	4,710
Work in process	1,190		(263		)	927
Finished goods	3,934		(1,745		)	2,189
Total	$	11,197	$	(3,371	)	$	7,826

PREPAID EXPENSES AND OTHER CURRENT ASSETS

3 Months Ended

Jun. 30, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

PREPAID EXPENSES AND OTHER CURRENT ASSETS

As of June 30, 2018, and March 31, 2018, Prepaid expenses and other current assets include the following (dollars in thousands):



	June 30, 2018		March 31, 2018
Unbilled accounts receivable (1)	$	—	$	1,910
Other prepaid expenses	408		557
Total	$	408	$	2,467

(1) As of April 1, 2018, in conjunction with the adoption of ASC 606, the balance of unbilled Accounts receivable is included in Revenue earned but not billed on the balance sheet.

PROPERTY AND EQUIPMENT, NET

3 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT, NET

As of June 30, 2018, and March 31, 2018, Property and equipment, net include the following (dollars in thousands):



	June 30, 2018			March 31, 2018
Land and land improvements	$	424		$	424
Buildings and building improvements	9,245			9,245
Furniture, fixtures and office equipment	7,101			7,096
Leasehold improvements	324			324
Equipment leased to customers	4,997			4,997
Plant equipment	11,988			12,106
	34,079			34,192
Less: accumulated depreciation and amortization	(21,508		)	(21,298		)
Property and equipment, net	$	12,571		$	12,894

Equipment included above under capital leases was as follows (dollars in thousands):



	June 30, 2018			March 31, 2018
Equipment	$	581		$	581
Less: accumulated depreciation and amortization	(379		)	(344		)
Equipment, net	$	202		$	237

Orion recorded depreciation expense of $0.3 and $0.4 million for the three months ended June 30, 2018 and 2017, respectively.

INTANGIBLE ASSETS, NET

3 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

INTANIGBLE ASSETS, NET

OTHER INTANGIBLE ASSETS, NET

As of June 30, 2018, and March 31, 2018, the components of, and changes in, the carrying amount of Other intangible assets, net were as follows (dollars in thousands):



	June 30, 2018							March 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Patents	$	2,636	$	(1,410	)	$	1,226	$	2,636	$	(1,370	)	$	1,266
Licenses	58		(58		)	—		58		(58		)	—
Trade name and trademarks	1,005		—			1,005		1,005		—			1,005
Customer relationships	3,600		(3,366		)	234		3,600		(3,326		)	274
Developed technology	900		(618		)	282		900		(582		)	318
Non-competition agreements	100		(100		)	—		100		(95		)	5
Total	$	8,299	$	(5,552	)	$	2,747	$	8,299	$	(5,431	)	$	2,868

Amortization expense on intangible assets was $0.1 and $0.2 million for the three months ended June 30, 2018 and 2017, respectively.

As of June 30, 2018, the weighted average remaining useful life of intangible assets was 5.4 years.

The estimated amortization expense for the remainder of fiscal 2019, the next five fiscal years and beyond is shown below (dollars in thousands):



Fiscal 2019 (period remaining)	$	322
Fiscal 2020	360
Fiscal 2021	285
Fiscal 2022	188
Fiscal 2023	97
Fiscal 2024	93
Thereafter	397
Total	$	1,742

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

ACCRUED EXPENSES AND OTHER

3 Months Ended

Jun. 30, 2018

Other Liabilities Disclosure [Abstract]

ACCRUED EXPENSES AND OTHER

As of June 30, 2018, and March 31, 2018, Accrued expenses and other include the following (dollars in thousands):



	June 30, 2018		March 31, 2018
Compensation and benefits	$	1,249	$	1,786
Accrued taxes	316		237
Contract costs	943		985
Legal and professional fees	561		400
Warranty	365		402
Sales returns reserve (1)	156		—
Credits due to customers (1)	996		—
Other accruals	323		361
Total	$	4,909	$	4,171

(1)Sales returns reserve was previously classified in Accounts receivable, net and Credits due to customers was previously classified in Accounts payable. As of April 1, 2018, in conjunction with the adoption of ASC 606, these balances are included in Accrued expenses and other on the Condensed Consolidated Balance Sheet.

Orion generally offers a limited warranty of one to ten years on its lighting products including the pass through of standard warranties offered by major original equipment component manufacturers. The manufacturers’ warranties cover lamps, ballasts, LED modules, LED chips, LED drivers, control devices, and other fixture related items, which are significant components in Orion's lighting products.

Changes in Orion’s warranty accrual (both current and long-term) were as follows (dollars in thousands):



	Three Months Ended June 30,
	2018			2017
Beginning of period	$	673		$	759
Reclassification on adoption of ASC 606	73			—
Provision to product cost of revenue	(22		)	24
Charges	(6		)	(2		)
End of period	$	718		$	781

NET LOSS PER COMMON SHARE

3 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

NET LOSS PER COMMON SHARE

Basic net loss per common share is computed by dividing Basic net loss attributable to common shareholders by the Weighted-average number of common shares outstanding for the period and does not consider common stock equivalents.

For the three months ended June 30, 2018 and 2017, Orion was in a net loss position; therefore, the basic and diluted weighted average shares outstanding are equal because any increase to the basic shares would be anti-dilutive. Basic and Diluted net loss per common share is calculated based upon the following:



	Three Months Ended June 30,
	2018			2017
Numerator:
Net loss (in thousands)	$	(2,692	)	$	(6,564	)
Denominator:
Weighted-average common shares outstanding	29,070,193			28,455,434
Weighted-average common shares and common share equivalents outstanding	29,070,193			28,455,434
Net loss per common share:
Basic	$	(0.09	)	$	(0.23	)
Diluted	$	(0.09	)	$	(0.23	)

The following table indicates the number of potentially dilutive securities excluded from the calculation of Diluted net loss per common share because their inclusion would have been anti-dilutive. The number of shares are as of the end of each period:



	June 30, 2018	June 30, 2017
Common stock options	624,667	1,442,153
Restricted shares	1,523,333	1,706,445
Total	2,148,000	3,148,598

LONG-TERM DEBT

3 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

LONG-TERM DEBT

Long-term debt consisted of the following (dollars in thousands):



	June 30, 2018			March 31, 2018
Revolving credit facility	$	2,302		$	3,908
Equipment lease obligations	165			184
Total long-term debt	2,467			4,092
Less current maturities	(80		)	(79		)
Long-term debt, less current maturities	$	2,387		$	4,013

Revolving Credit Agreement

Orion has an amended credit agreement ("Credit Agreement") that provides for a revolving credit facility ("Credit Facility") subject to a borrowing base requirement based on eligible receivables and inventory. As of June 30, 2018, Orion's borrowing base was approximately $2.5 million. The Credit Facility has a maturity date of February 6, 2021, and includes a $2.0 million sublimit for the issuance of letters of credit. As of June 30, 2018, Orion had no outstanding letters of credit. Borrowings outstanding as of June 30, 2018, amounted to approximately $2.3 million and are included in non-current liabilities in the accompanying Condensed Consolidated Balance Sheet. Orion estimates that as of June 30, 2018, it was eligible to borrow an additional $0.2 million under the Credit Facility based upon current levels of eligible Inventory and Accounts receivable.

Subject in each case to Orion's applicable borrowing base limitations, the Credit Agreement otherwise provides for a $15.0 million Credit Facility. This limit may increase to $20.0 million based on a borrowing base requirement, if Orion satisfies certain conditions. Orion did not meet the requirements to increase the borrowing limit to $20.0 million as of July 31, 2017, the most recent measurement date.

From and after any increase in the Credit Facility limit from $15.0 million to $20.0 million, the Credit Agreement requires that Orion maintain, as of the end of each month, a minimum ratio for the trailing twelve-month period of (i) earnings before interest, taxes, depreciation and amortization, subject to certain adjustments, to (ii) the sum of cash interest expense, certain principal payments on indebtedness and certain dividends, distributions and stock redemptions, equal to at least 1.10 to 1.00. The Credit Agreement contains additional customary covenants, including certain restrictions on Orion’s ability to incur additional indebtedness, consolidate or merge, enter into acquisitions, guarantee obligations of third parties, make loans or advances, declare or pay any dividend or distribution on Orion’s stock, redeem or repurchase shares of Orion’s stock, or pledge or dispose of assets. Orion was in compliance with its covenants in the Credit Agreement as of June 30, 2018.

Each subsidiary of Orion is a joint and several co-borrower or guarantor under the Credit Agreement, and the Credit Agreement is secured by a security interest in substantially all of Orion’s and each subsidiary’s personal property (excluding various assets relating to customer Orion Throughput Agreements ("OTAs") and a mortgage on certain real property.

Borrowings under the Credit Agreement bear interest at the daily three-month LIBOR plus 3.0% per annum, with a minimum interest charge for each year or portion of a year during the term of the Credit Agreement of $0.1 million, regardless of usage. As of June 30, 2018, the interest rate was 5.34%. Orion must pay an unused line fee of 0.25% per annum of the daily average unused amount of the Credit Facility and a letter of credit fee at the rate of 3.0% per annum on the undrawn amount of letters of credit outstanding from time to time under the Credit Facility.

Equipment Lease Obligations

In June 2015, Orion entered into a lease agreement with a financing company in the principal amount of $0.4 million to fund certain equipment. The lease is secured by the related equipment. The lease bears interest at a rate of 3.6%, and matures in June 2020. The lease contains a one dollar buyout option.

Customer Equipment Finance Notes Payable

In December 2014, Orion entered into a secured borrowing agreement with a financing company in the principal amount of $0.4 million to fund completed customer contracts under its OTA finance program that were previously funded under a different OTA credit agreement. The loan amount was secured by the OTA-related equipment and the expected future monthly payments under the supporting 25 individual OTA customer contracts. The borrowing agreement bore an interest rate of 8.36% and matured in April 2018.

Other Long-Term Debt

In September 2010, Orion entered into a note agreement with the Wisconsin Department of Commerce that provided Orion with $0.3 million to fund Orion’s rooftop solar project at its Manitowoc facility. This note is included in the table above as Other long-term debt. The note was collateralized by the related solar equipment. The note allowed for two years without interest accruing or principal payments due. Beginning in July 2012, the note bore an interest of 2% and required monthly payments of $4,600. The note matured in June 2017 and was paid in full upon maturity.

INCOME TAXES	3 Months Ended
INCOME TAXES	Jun. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The income tax provision was determined by applying an estimated annual effective tax rate based upon the facts and circumstances known to book loss before income tax, adjusting for discrete items. The actual effective tax rate is adjusted each interim period, as appropriate, for changes in facts and circumstances. For the three-month period ended June 30, 2018 and 2017, Orion recorded income tax expense of $22,000 and $0, respectively, using this methodology. As of June 30, 2018, and March 31, 2018, Orion had a full valuation allowance recorded against its deferred tax assets. Orion considers future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for the valuation allowance. In the event that Orion determines that the deferred tax assets are able to be realized, an adjustment to the deferred tax asset would increase income in the period such determination is made. Orion continues to evaluate the impact of the Tax Cut and Jobs Act ("Act") enacted December 22, 2017. The Act significantly changes U.S tax law by, among other things, reducing the U.S. federal corporate tax rate from 35% to 21%, imposing a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred, and creating new taxes on certain foreign sourced earnings. During fiscal 2018, Orion recognized a provisional reduction to its deferred tax assets of $9.9 million related to the Act. Substantially all of this decrease was offset by a corresponding decrease to the valuation allowance. The Company also provisionally estimated there will be no transition tax. As of June 30, 2018, Orion has not adjusted its provisional estimates. Because Orion remains in a loss position and has a full valuation allowance, Orion does not anticipate an impact to the income statement if there is a change to these provisional estimates. Uncertain Tax Positions As of June 30, 2018, the balance of gross unrecognized tax benefits was approximately $0.1 million, all of which would reduce Orion’s effective tax rate if recognized. Orion has classified the amounts recorded for uncertain tax benefits in the balance sheet as Other long-term liabilities to the extent that payment is not anticipated within one year. Orion recognizes penalties and interest related to uncertain tax liabilities in Income tax expense. Penalties and interest are included in the unrecognized tax benefits.

COMMITMENTS AND CONTINGENCIES	3 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Operating Leases Orion leases office space and equipment under operating leases expiring at various dates through 2020. Rent expense under operating leases was $0.2 million for the three months ended June 30, 2018 and 2017, respectively. Litigation Orion is subject to various claims and legal proceedings arising in the ordinary course of business. As of the date of this report, Orion is unable to currently assess whether the final resolution of any of such claims or legal proceedings may have a material adverse effect on our future results of operations. In addition to ordinary-course litigation, Orion was a party to the proceedings described below. On March 27, 2014, Orion was named as a defendant in a civil lawsuit filed by Neal R. Verfuerth, a former chief executive officer who left the Company in November 2012, in the United States District Court for the Eastern District of Wisconsin (Green Bay Division). The plaintiff alleged, among other things, that Orion breached certain agreements entered into with the plaintiff, including the plaintiff’s employment agreement, and violated certain laws. The complaint sought, among other relief, unspecified pecuniary and compensatory damages, fees and such other relief as the court may deem just and proper. On January 11, 2018, a three judge panel of the United States Court of Appeals Seventh Circuit unanimously affirmed the dismissal of all of the plaintiff’s claims against Orion. On November 10, 2017, a purported shareholder, Stephen Narten, filed a civil lawsuit in the Circuit Court for Manitowoc County against those individuals who served on Orion's Board of Directors during fiscal years 2015, 2016, and 2017 and certain current and former officers during the same period. The plaintiff, who purports to bring the suit derivatively on behalf of Orion, alleged that the director defendants breached their fiduciary duties in connection with granting certain stock-based incentive awards under Orion's 2004 Stock and Incentive Awards Plan and that the directors and current and former officers breached their fiduciary duties by accepting those awards. During the first quarter of fiscal 2019, the parties reached a settlement of the claims and the case was dismissed. The settlement did not have a material impact on Orion's results of operations or financial condition. State Tax Assessment During fiscal year 2018, Orion was notified of a pending sales and use tax audit by the Wisconsin Department of Revenue for the period covering April 1, 2013 through March 31, 2017. Although the final resolution of the Company’s sales and use tax audit is uncertain, based on current information, in the opinion of the Company’s management, the ultimate disposition of these matters will not have a material adverse effect on the Company’s consolidated balance sheet, statements of operations, or liquidity. During fiscal year 2019, Orion was notified of a pending sales and use tax audit by the California Department of Tax and Fee Administration for the period covering April 1, 2015 through March 31, 2018. Although the final resolution of the Company’s sales and use tax audit is uncertain, based on current information, in the opinion of the Company’s management, the ultimate disposition of these matters will not have a material adverse effect on the Company’s consolidated balance sheet, statements of operations, or liquidity.

SHAREHOLDERS’ EQUITY	3 Months Ended
SHAREHOLDERS’ EQUITY	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
SHAREHOLDERS' EQUITY	SHAREHOLDERS’ EQUITY Employee Stock Purchase Plan In August 2010, Orion’s board of directors approved a non-compensatory employee stock purchase plan, or ESPP. In the three months ended June 30, 2018, Orion issued 886 shares under the ESPP plan at a closing market price of $1.10. In prior years, Orion issued loans to non-executive employees to purchase shares of its stock. The loan program has been discontinued and new loans are no longer issued. As of March 31, 2017, four thousand dollars of such loans remained outstanding and were reflected on Orion’s balance sheet as a contra-equity account. During the nine months ended December 31, 2017, Orion entered into agreements with the counterparties to these loans. In exchange for the forgiveness of their outstanding loan balance, the employees returned their shares to Orion. As a result of these transactions, 1,230 shares were recorded within treasury stock and the loan balances were eliminated.

STOCK OPTIONS AND RESTRICTED SHARES

3 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK OPTIONS AND RESTRICTED SHARES

At Orion's 2016 Annual Meeting of Shareholders held on August 3, 2016, Orion's shareholders approved the Orion Energy Systems, Inc. 2016 Omnibus Incentive Plan (the "Plan"). The Plan authorizes grants of equity-based and incentive cash awards to eligible participants designated by the Plan's administrator. Awards under the Plan may consist of stock options, stock appreciation rights, performance shares, performance units, common stock, restricted stock, restricted stock units, incentive awards or dividend equivalent units.

Prior to shareholder approval of the Plan, the Company maintained its 2004 Stock and Incentive Awards Plan, as amended, which authorized the grant of cash and equity awards to employees (the “Former Plan”). No new awards are being granted under the Former Plan; however, all awards granted under the Former Plan that were outstanding as of August 3, 2016 will continue to be governed by the Former Plan. Forfeited awards originally issued under the Former Plan are canceled and are not available for subsequent issuance under the Plan.

Certain non-employee directors have elected to receive stock awards in lieu of cash compensation pursuant to elections made under Orion’s non-employee director compensation program. The Plan and the Former Plan also permit accelerated vesting in the event of certain changes of control of Orion as well as under other special circumstances.

The following amounts of stock-based compensation were recorded (dollars in thousands):



	Three Months Ended June 30,
	2018		2017
Cost of product revenue	$	1	$	6
Cost of service revenue	1		—
General and administrative	205		267
Sales and marketing	21		41
Research and development	—		6
Total	$	228	$	320

During the first three months of fiscal 2019, Orion had the following activity related to its stock-based compensation:



	Restricted Shares		Stock Options
Balance at March 31, 2018	1,485,799		629,667
Awards granted	519,000		—
Awards vested	(453,754	)	—
Awards forfeited	(27,712	)	(5,000	)
Awards outstanding at June 30, 2018	1,523,333		624,667
Per share price on grant date	0.84		—

As of June 30, 2018, the amount of deferred stock-based compensation expense to be recognized, over a remaining period of 2.1 years, was approximately $1.4 million.

SEGMENTS

3 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

SEGMENTS

Orion has the following business segments: Orion Engineered Services Division ("OES"), Orion Distribution Services Division ("ODS"), and Orion U.S. Markets Division ("USM"). The accounting policies are the same for each business segment as they are on a consolidated basis.

Orion Engineered Systems Division ("OES")

The OES segment develops and sells lighting products and provides construction and engineering services for Orion's commercial lighting and energy management systems. OES provides turnkey solutions for large national accounts, governments, municipalities and schools.

Orion Distribution Services Division ("ODS")

The ODS segment focuses on selling lighting products through manufacturer representative agencies and a network of broadline North American distributors.

Orion U.S. Markets Division ("USM")

The USM segment sells commercial lighting systems and energy management systems to the wholesale contractor markets. USM customers include ESCOs and electrical contractors.

Corporate and Other

Corporate and Other is comprised of operating expenses not directly allocated to Orion’s segments and adjustments to reconcile to consolidated results (dollars in thousands).



	Revenues				Operating Income (Loss)
	For the Three Months Ended June 30,				For the Three Months Ended June 30,
	2018		2017		2018			2017
Segments:
Orion Engineered Systems	$	3,231	$	5,408	$	(1,253	)	$	(1,891	)
Orion Distribution Services	9,226		5,760		85			(741		)
Orion U.S. Markets	1,365		1,390		(131		)	(1,532		)
Corporate and Other	—		—		(1,304		)	(2,338		)
	$	13,822	$	12,558	$	(2,603	)	$	(6,502	)

REORGANIZATION OF BUSINESS

3 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

REORGANIZATION OF BUSINESS

During fiscal 2018, Orion executed on a cost reduction plan by entering into separation agreements with multiple employees. Orion's restructuring expense for the three months ended June 30, 2018 and 2017 is reflected within its Condensed Consolidated Statements of Operations as follows (dollars in thousands):



	Three Months Ended June 30,		Three Months Ended June 30,
	2018		2017
Cost of product revenue	$	—	$	40
General and administrative	11		1,767
Sales and marketing	17		97
Total	$	28	$	1,904

Total restructuring expense by segment was recorded as follows (dollars in thousands):



	Three Months Ended June 30,		Three Months Ended June 30,
	2018		2017
Orion Engineered Systems	5		—
Orion Distribution Systems	$	12	$	75
Corporate and Other	11		1,829
Total	$	28	$	1,904

Cash payments for employee separation costs in connection with the reorganization of business plans were $0.1 million and $1.3 million in the three months ended June 30, 2018, and June 30, 2017, respectively. The remaining restructuring cost accruals as of June 30, 2018 were $0.2 million, which represents post-retirement medical benefits for one former employee which will be paid over several years.

SUBSEQUENT EVENTS	3 Months Ended
SUBSEQUENT EVENTS	Jun. 30, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Subsequent events are events or transactions that occur after the balance sheet date but before financial statements are issued. Recognized subsequent events are events or transactions that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements. Non-recognized subsequent events are events that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date. Management has reviewed events occurring through the date the financial statements were issued and noted no subsequent event requiring accrual or disclosure.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The Condensed Consolidated Financial Statements include the accounts of Orion Energy Systems, Inc. and its wholly-owned subsidiaries.
Basis of Presentation	The Condensed Consolidated Financial Statements include the accounts of Orion Energy Systems, Inc. and its wholly-owned subsidiaries. Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements of Orion have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair presentation have been included. Interim results are not necessarily indicative of results that may be expected for the fiscal year ending March 31, 2019 or other interim periods. The Condensed Consolidated Balance Sheet at March 31, 2018 has been derived from the audited consolidated financial statements at that date but does not include all of the information required by GAAP for complete financial statements. The accompanying unaudited Condensed Consolidated Financial Statements should
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during that reporting period. Areas that require the use of significant management estimates include revenue recognition, inventory obsolescence and allowance for doubtful accounts, accruals for warranty and loss contingencies, income taxes, impairment analyses, and certain equity transactions. Accordingly, actual results could differ from those estimates.
Concentration of Credit Risk and Other Risks and Uncertainties	Concentration of Credit Risk and Other Risks and Uncertainties Orion's cash is deposited with two financial institutions. At times, deposits in these institutions exceed the amount of insurance provided on such deposits. Orion has not experienced any losses in such accounts and believes that it is not exposed to any significant financial institution viability risk on these balances. Orion purchases components necessary for its lighting products, including ballasts, lamps and LED components, from multiple suppliers.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Issued: Not Yet Adopted In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, "Leases" (Subtopic 842). The pronouncement, and subsequent amendments, which is included in the Accounting Standards Codification as Subtopic 842 (“ASC 842”), requires that lessees recognize right-of-use assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and disclose additional quantitative and qualitative information about leasing arrangements. Under ASU 842, leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition. Similarly, lessors will be required to classify leases as sales-type, finance or operating leases, with classification affecting the pattern of income recognition. Classification for both lessees and lessors will be based on an assessment of whether risks and rewards, as well as substantive control, have been transferred through the lease contract. ASU 842 also provides guidance on the presentation of the effects of leases in the income statement and statement of cash flows. This guidance will be effective for Orion on April 1, 2019. Early adoption of the standard is permitted and a modified retrospective transition approach is required for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Orion has not yet completed its review of the full provisions of this standard against its outstanding lease arrangements and is in the process of quantifying the lease liability and related right of use asset which will be recorded to its consolidated balance sheets upon adoption of the standard. In addition, management continues to assess the impact of adoption of this standard on its consolidated statements of operations, cash flows, and the related footnote disclosures. Recently Adopted Standards On April 1, 2018, Orion adopted ASU 2014-09 and subsequent amendments, which is included in the Accounting Standards Codification as "Revenue from Contracts with Customers" (Topic 606) (“ASC 606”) and Sub-Topic 340-40 (“ASC 340-40”), using the modified retrospective approach. ASC 606 supersedes the revenue recognition requirements in “Revenue Recognition” (Topic 605) ("ASC 605") and provides guidance on the accounting for other assets and deferred costs associated with contracts with customers. ASC 606 requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASC 340-40 limits the circumstances that an entity can recognize an asset from the costs incurred to obtain or fulfill a contract that are not subject to the guidance in other portions in the Accounting Standards Codification, such as those related to inventory. The provisions of ASC 606 and ASC 340-40 require entities to use more judgments and estimates than under previous guidance when allocating the total consideration in a contract to the individual promises to customers (“performance obligations”) and determining when a performance obligation has been satisfied and revenue can be recognized. The adoption of ASC 606 did not have a material effect on Orion's financial statements. Orion has updated its processes and controls necessary for implementing this standard, including the increased disclosure requirements. In August 2016, the FASB issued ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments," which provided clarification and additional guidance as to the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. This ASU provided guidance as to the classification of a number of transactions including: contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, and distributions received from equity method investees. The new standard was effective for Orion in the first quarter of fiscal 2019 and has been applied through retrospective adjustment to all periods presented. The adoption of this standard did not have a material impact on Orion’s consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, “Compensation-Stock Compensation: Scope of Modification Accounting” which provides guidance about which changes to the terms or conditions of a share-based payment award would require an entity to apply modification accounting. The provisions of this standard were effective for Orion beginning on April 1, 2018. The adoption of this standard did not have a material impact on Orion’s consolidated financial statements.

REVENUE (Tables)

3 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table provides detail of Orion’s total revenues for the three months ended June 30, 2018 (dollars in thousands):



	Product		Services		Total
Revenue from contracts with customers:
Lighting revenues, by end user
Federal government	$	97	$	—	$	97
Commercial and industrial	11,901		1,014		12,915
Total lighting	11,998		1,014		13,012
Solar energy related revenues	20		—		20
Total revenues from contracts with customers	12,018		1,014		13,032
Revenue accounted for under other guidance	790		—		790
Total revenue	$	12,808	$	1,014	$	13,822

Summary of Contract Assets and Liabilities



	April 1, 2018		June 30, 2018
Accounts receivable, net	$	9,020	$	7,183
Contract assets	$	1,773	$	960
Contract liabilities	$	13	$	13

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]



	As Reported June 30, 2018			Adjustments			Balances without application of ASC 606
Assets
Cash and cash equivalents	$	7,835		$	—		$	7,835
Accounts receivable, net	7,183			(133		)	7,050
Revenue earned but not billed	1,055			(1,055		)	—
Inventories, net	8,597			(115		)	8,482
Deferred contract costs	—			397			397
Prepaid expenses and other current assets	408			636			1,044
Total current assets	25,078			(270		)	24,808
Property and equipment, net	12,571			—			12,571
Other intangible assets, net	2,747			—			2,747
Other long-term assets	105			—			105
Total assets	$	40,501		$	(270	)	$	40,231
Liabilities and Shareholders’ Equity
Accounts payable	$	10,215		$	997		$	11,212
Accrued expenses and other	4,909			(1,152		)	3,757
Deferred revenue, current	89			167			256
Current maturities of long-term debt	80			—			80
Total current liabilities	15,293			12			15,305
Revolving credit facility	2,302			—			2,302
Long-term debt, less current maturities	85			—			85
Deferred revenue, long-term	847			82			929
Other long-term liabilities	615			(82		)	533
Total liabilities	19,142			12			19,154
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	—			—			—
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	—			—			—
Additional paid-in capital	155,231			—			155,231
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	(36,087		)	—			(36,087		)
Retained deficit	(97,785		)	(282		)	(98,067		)
Total shareholders’ equity	21,359			(282		)	21,077
Total liabilities and shareholders’ equity	$	40,501		$	(270	)	$	40,231

ORION ENERGY SYSTEMS, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share amounts)



	Three Months Ended June 30, 2018
	As Reported			Adjustments			Balances without application of ASC 606
Product revenue	$	12,808		$	553		$	13,361
Service revenue	1,014			(725		)	289
Total revenue	13,822			(172		)	13,650
Cost of product revenue	9,724			1			9,725
Cost of service revenue	642			(421		)	221
Total cost of revenue	10,366			(420		)	9,946
Gross profit	3,456			248			3,704
Operating expenses:
General and administrative	3,076			—			3,076
Sales and marketing	2,578			256			2,834
Research and development	405			—			405
Total operating expenses	6,059			256			6,315
Loss from operations	(2,603		)	(8		)	(2,611		)
Other income (expense):
Other income	19			—			19
Interest expense	(89		)	(2		)	(91		)
Interest income	3			—			3
Total other expense	(67		)	(2		)	(69		)
Loss before income tax	(2,670		)	(10		)	(2,680		)
Income tax expense	22			—			22
Net loss	$	(2,692	)	$	(10	)	$	(2,702	)
Basic net loss per share attributable to common shareholders	$	(0.09	)	$	0.00		$	(0.09	)
Weighted-average common shares outstanding	29,070,193			—			29,070,193
Diluted net loss per share	$	(0.09	)	$	0.00		$	(0.09	)
Weighted-average common shares and share equivalents outstanding	29,070,193			—			29,070,193

ORION ENERGY SYSTEMS, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)



	Three Months Ended June 30, 2018
	As Reported			Adjustments			Balances without application of ASC 606
Operating activities
Net loss	$	(2,692	)	$	(10	)	$	(2,702	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	347			—			347
Amortization	121			—			121
Stock-based compensation	228			—			228
Provision for inventory reserves	17			—			17
Provision for bad debts	82			—			82
Other	3			—			3
Changes in operating assets and liabilities:
Accounts receivable, current and long-term	1,756			(151		)	1,605
Revenue earned but not billed	1,300			(1,300		)	—
Inventories	(102		)	(571		)	(673		)
Deferred contract costs	—			597			597
Prepaid expenses and other assets	150			1,273			1,423
Accounts payable	(575		)	112			(463		)
Accrued expenses and other	(553		)	147			(406		)
Deferred revenue, current and long-term	(21		)	(97		)	(118		)
Net cash (used in) provided by operating activities	61			—			61
Investing activities
Purchases of property and equipment	(23		)	—			(23		)
Additions to patents and licenses	—			—			—
Proceeds from sales of property, plant and equipment	—			—			—
Net cash used in investing activities	(23		)	—			(23		)
Financing activities
Payment of long-term debt and capital leases	(19		)	—			(19		)
Proceeds from revolving credit facility	17,188			—			17,188
Payment of revolving credit facility	(18,794		)	—			(18,794		)
Payments to settle employee tax withholdings on stock-based compensation	(3		)	—			(3		)
Net proceeds from employee equity exercises	1			—			1
Net cash used in financing activities	(1,627		)	—			(1,627		)
Net decrease in cash and cash equivalents	(1,589		)	—			(1,589		)
Cash and cash equivalents at beginning of period	9,424			—			9,424
Cash and cash equivalents at end of period	$	7,835		$	—		$	7,835

ACCOUNTS RECEIVABLE, NET (Tables)

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Accounts receivable and allowance for doubtful accounts balances

As of June 30, 2018 and March 31, 2018, Orion's Accounts receivable and Allowance for doubtful accounts balances were as follows (dollars in thousands):



	June 30, 2018			March 31, 2018
Accounts receivable, gross	$	7,416		$	8,886
Allowance for doubtful accounts	(233		)	(150		)
Accounts receivable, net	$	7,183		$	8,736

INVENTORIES, NET (Tables)

3 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Inventories

As of June 30, 2018, and March 31, 2018, Orion's Inventory balances were as follows (dollars in thousands):



	Cost		Reserve			Net
As of June 30, 2018
Raw materials and components	$	6,922	$	(1,335	)	$	5,587
Work in process	1,053		(310		)	743
Finished goods	3,818		(1,551		)	2,267
Total	$	11,793	$	(3,196	)	$	8,597

As of March 31, 2018
Raw materials and components	$	6,073	$	(1,363	)	$	4,710
Work in process	1,190		(263		)	927
Finished goods	3,934		(1,745		)	2,189
Total	$	11,197	$	(3,371	)	$	7,826

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)

3 Months Ended

Jun. 30, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses and other current assets

As of June 30, 2018, and March 31, 2018, Prepaid expenses and other current assets include the following (dollars in thousands):



	June 30, 2018		March 31, 2018
Unbilled accounts receivable (1)	$	—	$	1,910
Other prepaid expenses	408		557
Total	$	408	$	2,467

(1) As of April 1, 2018, in conjunction with the adoption of ASC 606, the balance of unbilled Accounts receivable is included in Revenue earned but not billed on the balance sheet.

PROPERTY AND EQUIPMENT, NET (Tables)

3 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Property and equipment

As of June 30, 2018, and March 31, 2018, Property and equipment, net include the following (dollars in thousands):



	June 30, 2018			March 31, 2018
Land and land improvements	$	424		$	424
Buildings and building improvements	9,245			9,245
Furniture, fixtures and office equipment	7,101			7,096
Leasehold improvements	324			324
Equipment leased to customers	4,997			4,997
Plant equipment	11,988			12,106
	34,079			34,192
Less: accumulated depreciation and amortization	(21,508		)	(21,298		)
Property and equipment, net	$	12,571		$	12,894

Schedule of equipment under capital leases

Equipment included above under capital leases was as follows (dollars in thousands):



	June 30, 2018			March 31, 2018
Equipment	$	581		$	581
Less: accumulated depreciation and amortization	(379		)	(344		)
Equipment, net	$	202		$	237

INTANGIBLE ASSETS, NET (Tables)

3 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of other intangible assets

As of June 30, 2018, and March 31, 2018, the components of, and changes in, the carrying amount of Other intangible assets, net were as follows (dollars in thousands):



	June 30, 2018							March 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Patents	$	2,636	$	(1,410	)	$	1,226	$	2,636	$	(1,370	)	$	1,266
Licenses	58		(58		)	—		58		(58		)	—
Trade name and trademarks	1,005		—			1,005		1,005		—			1,005
Customer relationships	3,600		(3,366		)	234		3,600		(3,326		)	274
Developed technology	900		(618		)	282		900		(582		)	318
Non-competition agreements	100		(100		)	—		100		(95		)	5
Total	$	8,299	$	(5,552	)	$	2,747	$	8,299	$	(5,431	)	$	2,868

Estimated amortization expense for each of the next five years

The estimated amortization expense for the remainder of fiscal 2019, the next five fiscal years and beyond is shown below (dollars in thousands):



Fiscal 2019 (period remaining)	$	322
Fiscal 2020	360
Fiscal 2021	285
Fiscal 2022	188
Fiscal 2023	97
Fiscal 2024	93
Thereafter	397
Total	$	1,742

ACCRUED EXPENSES AND OTHER (Tables)

3 Months Ended

Jun. 30, 2018

Other Liabilities Disclosure [Abstract]

Schedule of accrued expenses and other

As of June 30, 2018, and March 31, 2018, Accrued expenses and other include the following (dollars in thousands):



	June 30, 2018		March 31, 2018
Compensation and benefits	$	1,249	$	1,786
Accrued taxes	316		237
Contract costs	943		985
Legal and professional fees	561		400
Warranty	365		402
Sales returns reserve (1)	156		—
Credits due to customers (1)	996		—
Other accruals	323		361
Total	$	4,909	$	4,171

Changes in warranty accrual

Changes in Orion’s warranty accrual (both current and long-term) were as follows (dollars in thousands):



	Three Months Ended June 30,
	2018			2017
Beginning of period	$	673		$	759
Reclassification on adoption of ASC 606	73			—
Provision to product cost of revenue	(22		)	24
Charges	(6		)	(2		)
End of period	$	718		$	781

NET LOSS PER COMMON SHARE (Tables)

3 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Summary of the effect of net income per common share



	Three Months Ended June 30,
	2018			2017
Numerator:
Net loss (in thousands)	$	(2,692	)	$	(6,564	)
Denominator:
Weighted-average common shares outstanding	29,070,193			28,455,434
Weighted-average common shares and common share equivalents outstanding	29,070,193			28,455,434
Net loss per common share:
Basic	$	(0.09	)	$	(0.23	)
Diluted	$	(0.09	)	$	(0.23	)

Number of potentially dilutive securities



	June 30, 2018	June 30, 2017
Common stock options	624,667	1,442,153
Restricted shares	1,523,333	1,706,445
Total	2,148,000	3,148,598

STOCK OPTIONS AND RESTRICTED SHARES (Tables)

3 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based compensation

The following amounts of stock-based compensation were recorded (dollars in thousands):



	Three Months Ended June 30,
	2018		2017
Cost of product revenue	$	1	$	6
Cost of service revenue	1		—
General and administrative	205		267
Sales and marketing	21		41
Research and development	—		6
Total	$	228	$	320

Summary of outstanding non-vested stock options

During the first three months of fiscal 2019, Orion had the following activity related to its stock-based compensation:



	Restricted Shares		Stock Options
Balance at March 31, 2018	1,485,799		629,667
Awards granted	519,000		—
Awards vested	(453,754	)	—
Awards forfeited	(27,712	)	(5,000	)
Awards outstanding at June 30, 2018	1,523,333		624,667
Per share price on grant date	0.84		—

Summary of restricted shares granted

During the first three months of fiscal 2019, Orion had the following activity related to its stock-based compensation:



	Restricted Shares		Stock Options
Balance at March 31, 2018	1,485,799		629,667
Awards granted	519,000		—
Awards vested	(453,754	)	—
Awards forfeited	(27,712	)	(5,000	)
Awards outstanding at June 30, 2018	1,523,333		624,667
Per share price on grant date	0.84		—

SEGMENTS (Tables)

3 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment reporting information

Corporate and Other is comprised of operating expenses not directly allocated to Orion’s segments and adjustments to reconcile to consolidated results (dollars in thousands).



	Revenues				Operating Income (Loss)
	For the Three Months Ended June 30,				For the Three Months Ended June 30,
	2018		2017		2018			2017
Segments:
Orion Engineered Systems	$	3,231	$	5,408	$	(1,253	)	$	(1,891	)
Orion Distribution Services	9,226		5,760		85			(741		)
Orion U.S. Markets	1,365		1,390		(131		)	(1,532		)
Corporate and Other	—		—		(1,304		)	(2,338		)
	$	13,822	$	12,558	$	(2,603	)	$	(6,502	)

REORGANIZATION OF BUSINESS (Tables)

3 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

Restructuring Costs

restructuring expense for the three months ended June 30, 2018 and 2017 is reflected within its Condensed Consolidated Statements of Operations as follows (dollars in thousands):



	Three Months Ended June 30,		Three Months Ended June 30,
	2018		2017
Cost of product revenue	$	—	$	40
General and administrative	11		1,767
Sales and marketing	17		97
Total	$	28	$	1,904

Total restructuring expense by segment was recorded as follows (dollars in thousands):



	Three Months Ended June 30,		Three Months Ended June 30,
	2018		2017
Orion Engineered Systems	5		—
Orion Distribution Systems	$	12	$	75
Corporate and Other	11		1,829
Total	$	28	$	1,904

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - financial_instituion	1 Months Ended		3 Months Ended
	Jun. 30, 2018	Mar. 31, 2017	Jun. 30, 2018
Concentration of Credit Risk and Other Risks and Uncertainties
Number of financial institutions			2
Cost of revenue \| Customer Concentration Risk \| Customer One
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration risk, percentage			11.40%
Revenue \| Customer Concentration Risk \| Customer One
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration risk, percentage			16.20%
Accounts Receivable \| Customer Concentration Risk \| Customer One
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration risk, percentage	13.50%	13.20%
Accounts Receivable \| Customer Concentration Risk \| Customer Two
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration risk, percentage	12.20%
Accounts Receivable \| Customer Concentration Risk \| Customer Three
Concentration of Credit Risk and Other Risks and Uncertainties
Concentration risk, percentage	10.10%

REVENUE - Summary of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Apr. 01, 2018
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 7,183	$ 9,020
Contract assets	960	1,773
Contract liabilities	$ 13	$ 13

REVENUE - Financial Statement Impact of Adopting ASC 606 (Details) - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 13,032,000
Statement of Financial Position [Abstract]
Cash and cash equivalents	7,835,000	$ 8,485,000	$ 9,424,000	$ 17,307,000
Accounts receivable, net	7,183,000		8,736,000
Revenue earned but not billed	1,055,000		0
Inventories, net	8,597,000		7,826,000
Deferred contract costs	0		1,000,000
Prepaid expenses and other current assets	408,000		2,467,000
Total current assets	25,078,000		29,453,000
Property and equipment, net	12,571,000		12,894,000
Other intangible assets, net	2,747,000		2,868,000
Other long-term assets	105,000		110,000
Total assets	40,501,000		45,325,000
Accounts payable	10,215,000		11,675,000
Accrued expenses and other	4,909,000		4,171,000
Deferred revenue, current	89,000		499,000
Current maturities of long-term debt	80,000		79,000
Total current liabilities	15,293,000		16,424,000
Revolving credit facility	2,302,000		3,908,000
Long-term debt, less current maturities	85,000		105,000
Deferred revenue, long-term	847,000		940,000
Other long-term liabilities	615,000		524,000
Total liabilities	19,142,000		21,901,000
Commitments and contingencies
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	0		0
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	0		0
Additional paid-in capital	155,231,000		155,003,000
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	(36,087,000)		(36,085,000)
Retained deficit	(97,785,000)		(95,494,000)
Total shareholders’ equity	21,359,000		23,424,000
Total liabilities and shareholders’ equity	40,501,000		45,325,000
Income Statement [Abstract]
Total revenue	13,822,000	12,558,000
Cost of revenue	10,366,000	9,847,000
Gross profit	3,456,000	2,711,000
General and administrative	3,076,000	5,335,000
Sales and marketing	2,578,000	3,354,000
Research and development	405,000	524,000
Total operating expenses	6,059,000	9,213,000
Loss from operations	(2,603,000)	(6,502,000)
Other income	19,000	0
Interest expense	(89,000)	(67,000)
Interest income	3,000	5,000
Total other expense	(67,000)	(62,000)
Loss before income tax	(2,670,000)	(6,564,000)
Income tax expense	22,000	0
Net loss	$ (2,692,000)	$ (6,564,000)
Basic net loss per share attributable to common shareholders (in dollars per share)	$ (0.09)	$ (0.23)
Weighted-average common shares outstanding (in shares)	29,070,193	28,455,434
Diluted net loss per share (in dollars per share)	$ (0.09)	$ (0.23)
Weighted-average common shares and share equivalents outstanding (in shares)	29,070,193	28,455,434
Statement of Cash Flows [Abstract]
Depreciation	$ 347,000	$ 353,000
Amortization	121,000	162,000
Stock-based compensation	228,000	320,000
Provision for inventory reserves	17,000	130,000
Provision for bad debts	82,000	33,000
Other	3,000	12,000
Accounts receivable, current and long-term	1,756,000	2,103,000
Revenue earned but not billed	1,300,000	0
Inventories	(102,000)	1,196,000
Deferred contract costs	0	(770,000)
Prepaid expenses and other assets	150,000	(163,000)
Accounts payable	(575,000)	(2,028,000)
Accrued expenses and other	(553,000)	(743,000)
Deferred revenue, current and long-term	(21,000)	204,000
Net cash provided by (used in) operating activities	61,000	(5,755,000)
Purchases of property and equipment	(23,000)	(204,000)
Additions to patents and licenses	0	(20,000)
Proceeds from sales of property, plant and equipment	0
Net cash used in investing activities	(23,000)	(224,000)
Payment of long-term debt and capital leases	(19,000)	(67,000)
Proceeds from revolving credit facility	17,188,000	16,307,000
Payment of revolving credit facility	(18,794,000)	(19,083,000)
Payments to settle employee tax withholdings on stock-based compensation	(3,000)	0
Net proceeds from employee equity exercises	1,000	0
Net cash used in financing activities	(1,627,000)	(2,843,000)
Net decrease in cash and cash equivalents	(1,589,000)	(8,822,000)
Adjustments \| Accounting Standards Update 2014-09
Statement of Financial Position [Abstract]
Cash and cash equivalents	0		0
Accounts receivable, net	(133,000)
Revenue earned but not billed	(1,055,000)
Inventories, net	(115,000)
Deferred contract costs	397,000
Prepaid expenses and other current assets	636,000
Total current assets	(270,000)
Property and equipment, net	0
Other intangible assets, net	0
Other long-term assets	0
Total assets	(270,000)
Accounts payable	997,000
Accrued expenses and other	(1,152,000)
Deferred revenue, current	167,000
Current maturities of long-term debt	0
Total current liabilities	12,000
Revolving credit facility	0
Long-term debt, less current maturities	0
Deferred revenue, long-term	82,000
Other long-term liabilities	(82,000)
Total liabilities	12,000
Commitments and contingencies
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	0
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	0
Additional paid-in capital	0
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	0
Retained deficit	(282,000)
Total shareholders’ equity	(282,000)
Total liabilities and shareholders’ equity	(270,000)
Income Statement [Abstract]
Total revenue	(172,000)
Cost of revenue	(420,000)
Gross profit	248,000
General and administrative	0
Sales and marketing	256,000
Research and development	0
Total operating expenses	256,000
Loss from operations	(8,000)
Other income	0
Interest expense	(2,000)
Interest income	0
Total other expense	(2,000)
Loss before income tax	(10,000)
Income tax expense	0
Net loss	$ (10,000)
Basic net loss per share attributable to common shareholders (in dollars per share)	$ 0.00
Weighted-average common shares outstanding (in shares)	0
Diluted net loss per share (in dollars per share)	$ 0.00
Weighted-average common shares and share equivalents outstanding (in shares)	0
Statement of Cash Flows [Abstract]
Depreciation	$ 0
Amortization	0
Stock-based compensation	0
Provision for inventory reserves	0
Provision for bad debts	0
Other	0
Accounts receivable, current and long-term	(151,000)
Revenue earned but not billed	(1,300,000)
Inventories	(571,000)
Deferred contract costs	597,000
Prepaid expenses and other assets	1,273,000
Accounts payable	112,000
Accrued expenses and other	147,000
Deferred revenue, current and long-term	(97,000)
Net cash provided by (used in) operating activities	0
Purchases of property and equipment	0
Additions to patents and licenses	0
Proceeds from sales of property, plant and equipment	0
Net cash used in investing activities	0
Payment of long-term debt and capital leases	0
Proceeds from revolving credit facility	0
Payment of revolving credit facility	0
Net proceeds from employee equity exercises	0
Net cash used in financing activities	0
Net decrease in cash and cash equivalents	0
Balances without application of ASC 606
Statement of Financial Position [Abstract]
Cash and cash equivalents	7,835,000		$ 9,424,000
Accounts receivable, net	7,050,000
Revenue earned but not billed	0
Inventories, net	8,482,000
Deferred contract costs	397,000
Prepaid expenses and other current assets	1,044,000
Total current assets	24,808,000
Property and equipment, net	12,571,000
Other intangible assets, net	2,747,000
Other long-term assets	105,000
Total assets	40,231,000
Accounts payable	11,212,000
Accrued expenses and other	3,757,000
Deferred revenue, current	256,000
Current maturities of long-term debt	80,000
Total current liabilities	15,305,000
Revolving credit facility	2,302,000
Long-term debt, less current maturities	85,000
Deferred revenue, long-term	929,000
Other long-term liabilities	533,000
Total liabilities	19,154,000
Commitments and contingencies
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2018 and March 31, 2018; no shares issued and outstanding at June 30, 2018 and March 31, 2018	0
Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2018 and March 31, 2018; shares issued: 38,838,329 at June 30, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,403,485 at June 30, 2018 and 28,953,183 at March 31, 2018	0
Additional paid-in capital	155,231,000
Treasury stock, common shares: 9,434,844 at June 30, 2018 and 9,431,392 at March 31, 2018	(36,087,000)
Retained deficit	(98,067,000)
Total shareholders’ equity	21,077,000
Total liabilities and shareholders’ equity	40,231,000
Income Statement [Abstract]
Total revenue	13,650,000
Cost of revenue	9,946,000
Gross profit	3,704,000
General and administrative	3,076,000
Sales and marketing	2,834,000
Research and development	405,000
Total operating expenses	6,315,000
Loss from operations	(2,611,000)
Other income	19,000
Interest expense	(91,000)
Interest income	3,000
Total other expense	(69,000)
Loss before income tax	(2,680,000)
Income tax expense	22,000
Net loss	$ (2,702,000)
Basic net loss per share attributable to common shareholders (in dollars per share)	$ (0.09)
Weighted-average common shares outstanding (in shares)	29,070,193
Diluted net loss per share (in dollars per share)	$ (0.09)
Weighted-average common shares and share equivalents outstanding (in shares)	29,070,193
Statement of Cash Flows [Abstract]
Depreciation	$ 347,000
Amortization	121,000
Stock-based compensation	228,000
Provision for inventory reserves	17,000
Provision for bad debts	82,000
Other	3,000
Accounts receivable, current and long-term	1,605,000
Revenue earned but not billed	0
Inventories	(673,000)
Deferred contract costs	597,000
Prepaid expenses and other assets	1,423,000
Accounts payable	(463,000)
Accrued expenses and other	(406,000)
Deferred revenue, current and long-term	(118,000)
Net cash provided by (used in) operating activities	61,000
Purchases of property and equipment	(23,000)
Additions to patents and licenses	0
Proceeds from sales of property, plant and equipment	0
Net cash used in investing activities	(23,000)
Payment of long-term debt and capital leases	(19,000)
Proceeds from revolving credit facility	17,188,000
Payment of revolving credit facility	(18,794,000)
Payments to settle employee tax withholdings on stock-based compensation	(3,000)
Net proceeds from employee equity exercises	1,000
Net cash used in financing activities	(1,627,000)
Net decrease in cash and cash equivalents	(1,589,000)
Product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	12,018,000
Income Statement [Abstract]
Total revenue	12,808,000	11,781,000
Cost of revenue	9,724,000	8,813,000
Product revenue \| Adjustments \| Accounting Standards Update 2014-09
Income Statement [Abstract]
Total revenue	553,000
Cost of revenue	1,000
Product revenue \| Balances without application of ASC 606
Income Statement [Abstract]
Total revenue	13,361,000
Cost of revenue	9,725,000
Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,014,000
Income Statement [Abstract]
Total revenue	1,014,000	777,000
Cost of revenue	642,000	$ 1,034,000
Service revenue \| Adjustments \| Accounting Standards Update 2014-09
Income Statement [Abstract]
Total revenue	(725,000)
Cost of revenue	(421,000)
Service revenue \| Balances without application of ASC 606
Income Statement [Abstract]
Total revenue	289,000
Cost of revenue	$ 221,000

REVENUE - Narrative (Details) - USD ($)	3 Months Ended
REVENUE - Narrative (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 13,032,000
Proceeds from sale of revenue earned but not billed	2,000,000
Gain (loss) on sale of revenue earned but not billed	(54,046,000)
Unbilled accounts receivable	100,000		$ 600,000
Contract liabilities	13,000		$ 13,000
Total revenue	13,822,000	$ 12,558,000
Transferred over time
Disaggregation of Revenue [Line Items]
Revenue	0
Light fixture sales-type lease
Disaggregation of Revenue [Line Items]
Total revenue	700,000
Sale of tax credits
Disaggregation of Revenue [Line Items]
Total revenue	30,875
Legacy solar facilities
Disaggregation of Revenue [Line Items]
Total revenue	$ 18,889

REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 13,032
Revenue accounted for under other guidance	790
Total revenue	13,822	$ 12,558
Product revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	12,018
Revenue accounted for under other guidance	790
Total revenue	12,808	11,781
Service revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	1,014
Revenue accounted for under other guidance	0
Total revenue	1,014	$ 777
Federal government
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	97
Federal government \| Product revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	97
Federal government \| Service revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0
Commercial and industrial
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	12,915
Commercial and industrial \| Product revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	11,901
Commercial and industrial \| Service revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	1,014
Total lighting
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,012
Total lighting \| Product revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	11,998
Total lighting \| Service revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	1,014
Solar energy related revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	20
Solar energy related revenues \| Product revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	20
Solar energy related revenues \| Service revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 0

ACCOUNTS RECEIVABLE, NET (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Receivables [Abstract]
Accounts receivable, gross	$ 7,416	$ 8,886
Allowance for doubtful accounts	(233)	(150)
Accounts receivable, net	$ 7,183	$ 8,736

INVENTORIES, NET (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Cost
Raw materials and components	$ 6,922	$ 6,073
Work in process	1,053	1,190
Finished goods	3,818	3,934
Total	11,793	11,197
Reserve
Raw materials and components	(1,335)	(1,363)
Work in process	(310)	(263)
Finished goods	(1,551)	(1,745)
Total	(3,196)	(3,371)
Net
Raw materials and components	5,587	4,710
Work in process	743	927
Finished goods	2,267	2,189
Total	$ 8,597	$ 7,826

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Unbilled accounts receivable	$ 0	$ 1,910
Other prepaid expenses	408	557
Total	$ 408	$ 2,467

PROPERTY AND EQUIPMENT, NET (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Property and equipment
Gross property and equipment	$ 34,079	$ 34,192
Less: accumulated depreciation and amortization	(21,508)	(21,298)
Property and equipment, net	12,571	12,894
Land and land improvements
Property and equipment
Gross property and equipment	424	424
Buildings and building improvements
Property and equipment
Gross property and equipment	9,245	9,245
Furniture, fixtures and office equipment
Property and equipment
Gross property and equipment	7,101	7,096
Leasehold improvements
Property and equipment
Gross property and equipment	324	324
Equipment leased to customers
Property and equipment
Gross property and equipment	4,997	4,997
Plant equipment
Property and equipment
Gross property and equipment	$ 11,988	$ 12,106

PROPERTY AND EQUIPMENT, NET (Equipment under Capital Leases) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Capital Leased Assets [Line Items]
Equipment	$ 34,079	$ 34,192
Less: accumulated depreciation and amortization	(21,508)	(21,298)
Property and equipment, net	12,571	12,894
Assets Held under Capital Leases
Capital Leased Assets [Line Items]
Equipment	581	581
Less: accumulated depreciation and amortization	(379)	(344)
Property and equipment, net	$ 202	$ 237

PROPERTY AND EQUIPMENT, NET (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Depreciation	$ 347	$ 353

INTANGIBLE ASSETS, NET (Components and Changes in Other Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,299	$ 8,299
Accumulated Amortization	(5,552)	(5,431)
Net	2,747	2,868
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,636	2,636
Accumulated Amortization	(1,410)	(1,370)
Net	1,226	1,266
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	58	58
Accumulated Amortization	(58)	(58)
Net	0	0
Trade name and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,005	1,005
Accumulated Amortization	0	0
Net	1,005	1,005
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,600	3,600
Accumulated Amortization	(3,366)	(3,326)
Net	234	274
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	900	900
Accumulated Amortization	(618)	(582)
Net	282	318
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	100	100
Accumulated Amortization	(100)	(95)
Net	$ 0	$ 5

INTANGIBLE ASSETS, NET (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 0.1	$ 0.2
Weighted average
Segment Reporting Information [Line Items]
Intangible assets, estimated economic useful life	5 years 4 months 29 days

INTANGIBLE ASSETS, NET (Future Amortization by Fiscal Year) (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Finite-Lived Intangible Assets, Estimated Amortization Expense
Fiscal 2019 (period remaining)	$ 322
Fiscal 2020	360
Fiscal 2021	285
Fiscal 2022	188
Fiscal 2023	97
Fiscal 2024	93
Thereafter	397
Total	$ 1,742

ACCRUED EXPENSES AND OTHER (Accrued Expenses and Other) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 1,249	$ 1,786
Accrued taxes	316	237
Contract costs	943	985
Legal and professional fees	561	400
Warranty	365	402
Sales returns reserve	156	0
Credits due to customers	996	0
Other accruals	323	361
Total	$ 4,909	$ 4,171

ACCRUED EXPENSES AND OTHER (Warranty Accrual) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Other Liabilities Disclosure [Abstract]
Standard And Extended Product Warranty Accrual, Increase (Decrease) Reclassification Adjustment	$ 73	$ 0
Movement in Standard Product Warranty Accrual
Beginning of period	673	759
Provision to product cost of revenue	(22)	24
Charges	(6)	(2)
End of period	$ 718	$ 781

ACCRUED EXPENSES AND OTHER (Narrative) (Details)	3 Months Ended
ACCRUED EXPENSES AND OTHER (Narrative) (Details)	Jun. 30, 2018
Minimum
Segment Reporting Information [Line Items]
Limited warranty term	1 year
Maximum
Segment Reporting Information [Line Items]
Limited warranty term	10 years

NET LOSS PER COMMON SHARE (Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net loss	$ (2,692)	$ (6,564)
Denominator:
Weighted-average common shares outstanding (in shares)	29,070,193	28,455,434
Weighted-average common shares and common share equivalents outstanding (in shares)	29,070,193	28,455,434
Net loss per common share:
Basic (usd per share)	$ (0.09)	$ (0.23)
Diluted (usd per share)	$ (0.09)	$ (0.23)

NET LOSS PER COMMON SHARE (Potentially Dilutive Securities) (Details) - shares	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Number of potentially dilutive securities
Potentially dilutive securities outstanding (in shares)	2,148,000	3,148,598
Common stock options
Number of potentially dilutive securities
Potentially dilutive securities outstanding (in shares)	624,667	1,442,153
Restricted shares
Number of potentially dilutive securities
Potentially dilutive securities outstanding (in shares)	1,523,333	1,706,445

RELATED PARTY TRANSACTIONS (Details) - USD ($)	3 Months Ended
RELATED PARTY TRANSACTIONS (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Related Party Transactions [Abstract]
Related party transactions	$ 0	$ 0

LONG-TERM DEBT (Summary of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Long-term debt
Total long-term debt	$ 2,467	$ 4,092
Less current maturities	(80)	(79)
Long-term debt, less current maturities	2,387	4,013
Revolving credit facility
Long-term debt
Total long-term debt	2,302	3,908
Equipment lease obligations
Long-term debt
Total long-term debt	$ 165	$ 184

LONG-TERM DEBT (Narrative) (Details)	1 Months Ended		3 Months Ended
LONG-TERM DEBT (Narrative) (Details)	Jul. 31, 2012 USD ($)	Sep. 30, 2010 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jul. 31, 2017 USD ($)	Jun. 30, 2015 USD ($)	Jun. 01, 2015 USD ($)	Dec. 31, 2014 USD ($) contract
Line of Credit Facility [Line Items]
Outstanding letters of credit			$ 0
Revolving credit facility			2,302,000	$ 3,908,000
Equipment lease obligations
Line of Credit Facility [Line Items]
Lease interest rate							3.60%
Lease agreement, principal amount							$ 377,000
Net equipment lease obligation buyout option						$ 1	$ 1
Agreement with Wisconsin Department of Commerce
Line of Credit Facility [Line Items]
Face amount of debt		$ 260,000
Lease interest rate	2.00%
Period of time without interest accruing or principal payments due		2 years
Periodic payment	$ 4,600
Credit Agreement \| Revolving credit facility \| Wells Fargo Bank, National Association
Line of Credit Facility [Line Items]
Credit facility current limit			2,500,000
Revolving credit facility			2,300,000
Credit facility, additional borrowing capacity			200,000
Credit facility, maximum limit			$ 15,000,000.0
Potential maximum borrowing					$ 20,000,000
Credit facility, minimum indebtedness ratio			1.10
Interest payment			$ 100,000
Interest rate			5.33575%
Unused commitment fee			0.25%
Credit Agreement \| Revolving credit facility \| Wells Fargo Bank, National Association \| London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.00%
Credit Agreement \| Letter of Credit \| Wells Fargo Bank, National Association
Line of Credit Facility [Line Items]
Credit facility, maximum limit			$ 2,000,000
Unused commitment fee			3.00%
December 2014 OTA Finance Program \| De Lage Landen Financial Services, Inc. \| Secured Debt
Line of Credit Facility [Line Items]
Lease interest rate								8.36%
Principal amount of secured debt								$ 446,000
Number of contracts for collateral (contract) \| contract								25

INCOME TAXES (Details) - USD ($)	3 Months Ended		12 Months Ended
INCOME TAXES (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 22,000	$ 0
Deferred tax assets			$ 9,900,000
Unrecognized tax benefits	$ 100,000

SHAREHOLDERS’ EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2015	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Share issued under ESPP	886
Closing market price		$ 1.10
Loans issued to non-executive employees outstanding			$ 4
Treasury stock acquired (shares)	1,230

STOCK OPTIONS AND RESTRICTED SHARES (Stock-based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Stock-based compensation
Total	$ 228	$ 320
Cost of product revenue
Stock-based compensation
Total	1	6
Cost of service revenue
Stock-based compensation
Total	1	0
General and administrative
Stock-based compensation
Total	205	267
Sales and marketing
Stock-based compensation
Total	21	41
Research and development
Stock-based compensation
Total	$ 0	$ 6

STOCK OPTIONS AND RESTRICTED SHARES (Restricted Shares and Stock Options) (Details)	3 Months Ended
	Jun. 30, 2018 $ / shares shares
Stock Options
Non-vested, beginning balance (shares)	629,667
Awards granted (shares)	0
Awards vested (shares)	0
Awards forfeited (shares)	(5,000)
Non-vested, ending balance (shares)	624,667
Per share price on grant date (usd per share) \| $ / shares	$ 0
Restricted shares
Restricted Shares
Beginning balance (shares)	1,485,799
Awards granted (shares)	519,000
Awards vested (shares)	(453,754)
Awards forfeited (shares)	(27,712)
Ending balance (shares)	1,523,333
Restricted shares \| Minimum
Restricted Shares
Per share price on grant date (usd per share) \| $ / shares	$ 0.84

STOCK OPTIONS AND RESTRICTED SHARES (Narrative) (Details) $ in Millions	3 Months Ended
	Jun. 30, 2018 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Deferred stock-based compensation related to grants of restricted shares, period of recognition	2 years 1 month
Deferred stock-based compensation related to grants of restricted shares	$ 1.4

SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
SEGMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Corporate and Other
Revenues	$ 13,822	$ 12,558
Operating Income (Loss)	(2,603)	(6,502)
Operating Segments \| Orion Engineered Systems
Corporate and Other
Revenues	3,231	5,408
Operating Income (Loss)	(1,253)	(1,891)
Operating Segments \| Orion Distribution Services
Corporate and Other
Revenues	9,226	5,760
Operating Income (Loss)	85	(741)
Operating Segments \| Orion U.S. Markets
Corporate and Other
Revenues	1,365	1,390
Operating Income (Loss)	(131)	(1,532)
Corporate and Other
Corporate and Other
Revenues	0	0
Operating Income (Loss)	$ (1,304)	$ (2,338)

REORGANIZATION OF BUSINESS (Restructuring by Statement of Operations Location) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 28	$ 1,904
Cost of product revenue
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0	40
General and administrative
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	11	1,767
Sales and marketing
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 17	$ 97

REORGANIZATION OF BUSINESS (Restructuring by Segment) (Details) - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 28,000	$ 1,904,000
Orion Engineered Systems
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0
Operating Segments \| Orion Engineered Systems
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	5,000	0
Operating Segments \| Orion Distribution Services
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	12,000	75,000
Corporate and Other
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 11,000	$ 1,829,000

REORGANIZATION OF BUSINESS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	$ 0.1	$ 1.3
Post-employment medical benefits
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0.2

RELATED PARTY TRANSACTIONS	3 Months Ended
RELATED PARTY TRANSACTIONS	Jun. 30, 2018
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS During the three months ended June 30, 2018 and 2017, Orion did not have any related party transactions.