Entity Central Index Key Long term debt and capital lease obligations less current maturities. Provision for inventory reserves Proceeds from Exercise of Warrants and Stock Options Inventory, Raw Materials and Supplies, Valuation Reserves Inventory, Work in Process, Valuation Reserves Inventory, Finished Goods, Valuation Reserves Finite-Lived and Indefinite-Lived Intangible Assets, Gross Document and entity information. Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Trading Symbol Trading Symbol Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Statement Of Financial Position [Abstract] Assets Assets [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accounts receivable, net Accounts Receivable Net Current Revenue earned but not billed Unbilled Contracts Receivable Inventories, net Inventory Net Deferred contract costs Deferred Costs Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Other intangible assets, net Intangible Assets Net Excluding Goodwill Other long-term assets Other Assets Noncurrent Total assets Assets Liabilities and Shareholders’ Equity Liabilities And Stockholders Equity [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other Accrued Liabilities Current Deferred revenue, current Contract With Customer Liability Current Current maturities of long-term debt Long Term Debt Current Total current liabilities Liabilities Current Revolving credit facility Long Term Line Of Credit Long-term debt, less current maturities Long Term Debt And Capital Lease Obligations Less Current Maturities Deferred revenue, long-term Contract With Customer Liability Noncurrent Other long-term liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments And Contingencies Shareholders’ equity: Stockholders Equity [Abstract] Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at December 31, 2018 and March 31, 2018; no shares issued and outstanding at December 31, 2018 and March 31, 2018 Preferred Stock Value Common stock, no par value: Shares authorized: 200,000,000 at December 31, 2018 and March 31, 2018; shares issued: 39,011,019 at December 31, 2018 and 38,384,575 at March 31, 2018; shares outstanding: 29,571,944 at December 31, 2018 and 28,953,183 at March 31, 2018 Common Stock Value Additional paid-in capital Additional Paid In Capital Treasury stock, common shares: 9,439,075 at December 31, 2018 and 9,431,392 at March 31, 2018 Treasury Stock Value Retained deficit Retained Earnings Accumulated Deficit Total shareholders’ equity Stockholders Equity Total liabilities and shareholders’ equity Liabilities And Stockholders Equity Preferred stock, par value (USD per share) Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock Shares Outstanding Common stock, par value (USD per share) Common Stock No Par Value Common stock, shares authorized (in shares) Common Stock Shares Authorized Common stock, shares issued (in shares) Common Stock Shares Issued Common stock, shares outstanding (in shares) Shares Outstanding Treasury stock (in shares) Treasury Stock Shares Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Product revenue Product [Member] Service revenue Service [Member] Statement [Line Items] Statement [Line Items] Revenues Revenues Cost of revenue Cost Of Goods And Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] General and administrative General And Administrative Expense Impairment of intangible assets Asset Impairment Charges Sales and marketing Selling And Marketing Expense Research and development Research And Development Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other income (expense): Nonoperating Income Expense [Abstract] Other income Other Nonoperating Income Interest expense Interest Expense Amortization of debt issue costs Amortization Of Financing Costs Interest income Investment Income Interest Total other expense Nonoperating Income Expense Loss before income tax Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax (benefit) expense Income Tax Expense Benefit Net loss Net Income Loss Basic net loss per share attributable to common shareholders Earnings Per Share Basic Weighted-average common shares outstanding Weighted Average Number Of Shares Outstanding Basic Diluted net loss per share Earnings Per Share Diluted Weighted-average common shares and share equivalents outstanding Weighted Average Number Of Diluted Shares Outstanding Statement Of Cash Flows [Abstract] Operating activities Net Cash Provided By Used In Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash used in operating activities: Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation Depreciation Amortization of intangible assets Amortization Of Intangible Assets Stock-based compensation Share Based Compensation Amortization of debt issue costs Provision for inventory reserves Provision For Inventory Reserves Provision for bad debts Provision For Doubtful Accounts Other Other Noncash Income Expense Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable, current and long-term Increase Decrease In Accounts Receivable Revenue earned but not billed Increase Decrease In Contract With Customer Asset Inventories Increase Decrease In Inventories Deferred contract costs Increase Decrease In Deferred Charges Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other Increase Decrease In Accrued Liabilities Deferred revenue, current and long-term Increase Decrease In Contract With Customer Liability Net cash used in operating activities Net Cash Provided By Used In Operating Activities Investing activities Net Cash Provided By Used In Investing Activities [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Additions to patents and licenses Payments To Acquire Intangible Assets Net cash used in investing activities Net Cash Provided By Used In Investing Activities Financing activities Net Cash Provided By Used In Financing Activities [Abstract] Payment of long-term debt and capital leases Repayments Of Long Term Debt Proceeds from revolving credit facility Proceeds From Long Term Lines Of Credit Payment of revolving credit facility Repayments Of Long Term Lines Of Credit Payments to settle employee tax withholdings on stock-based compensation Payments Related To Tax Withholding For Share Based Compensation Deferred financing costs Payments Of Financing Costs Net proceeds from employee equity exercises Proceeds From Exercise Of Warrants And Stock Options Net cash used in financing activities Net Cash Provided By Used In Financing Activities Net decrease in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Organization Consolidation And Presentation Of Financial Statements [Abstract] DESCRIPTION OF BUSINESS Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Revenue From Contract With Customer [Abstract] REVENUE Revenue From Contract With Customer [Text Block] Receivables [Abstract] ACCOUNTS RECEIVABLE, NET Loans Notes Trade And Other Receivables Disclosure [Text Block] Inventory Disclosure [Abstract] INVENTORIES, NET Inventory Disclosure [Text Block] Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] PREPAID EXPENSES AND OTHER CURRENT ASSETS Other Current Assets [Text Block] Property Plant And Equipment [Abstract] PROPERTY AND EQUIPMENT, NET Property Plant And Equipment Disclosure [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] OTHER INTANGIBLE ASSETS, NET Goodwill And Intangible Assets Disclosure [Text Block] Other Liabilities Disclosure [Abstract] ACCRUED EXPENSES AND OTHER Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Earnings Per Share [Abstract] NET LOSS PER COMMON SHARE Earnings Per Share [Text Block] Debt Disclosure [Abstract] LONG-TERM DEBT Long Term Debt [Text Block] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments And Contingencies Disclosure [Text Block] Stockholders Equity Note [Abstract] SHAREHOLDERS' EQUITY Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] STOCK OPTIONS AND RESTRICTED SHARES Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Segment Reporting [Abstract] SEGMENTS Segment Reporting Disclosure [Text Block] Restructuring And Related Activities [Abstract] REORGANIZATION OF BUSINESS Restructuring And Related Activities Disclosure [Text Block] Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Use of Estimates Use Of Estimates Concentration of Credit Risk and Other Risks and Uncertainties Concentration Risk Credit Risk Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASC 606 Accounting Standards Update201409 [Member] Disaggregation of Revenue Disaggregation Of Revenue Table [Text Block] Summary of Contract Assets and Liabilities Contract With Customer Asset And Liability Table [Text Block] Impact of Adopting ASC 606 on Unaudited Condensed Consolidated Balance Sheets Schedule Of Condensed Balance Sheet Table [Text Block] Impact of Adopting ASC 606 on Unaudited Condensed Consolidated Statements of Operations Schedule Of Condensed Income Statement Table [Text Block] Impact of Adopting ASC 606 on Unaudited Condensed Consolidated Statements of Cash Flows Schedule Of Condensed Cash Flow Statement Table [Text Block] Accounts receivable and allowance for doubtful accounts balances Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Inventories Schedule Of Inventory Current Table [Text Block] Prepaid expenses and other current assets Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block] Property and equipment Property Plant And Equipment [Text Block] Schedule of equipment under capital leases Schedule Of Capital Leased Asssets Table [Text Block] Summary of other intangible assets Schedule Of Finite Lived Intangible Assets Table [Text Block] Summary of Estimated Amortization Expense Finite Lived Intangible Assets Amortization Expense Table [Text Block] Schedule of accrued expenses and other Schedule Of Accrued Liabilities Table [Text Block] Changes in warranty accrual Schedule Of Product Warranty Liability Table [Text Block] Summary of the effect of net income per common share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Number of potentially dilutive securities Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Summary of Long-Term Debt Schedule Of Debt Table [Text Block] Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity Table [Text Block] Stock-based compensation Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Summary of outstanding non-vested stock options Schedule Of Nonvested Share Activity Table [Text Block] Summary of restricted shares granted Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block] Segment reporting information Schedule Of Segment Reporting Information By Segment [Text Block] Restructuring Costs Schedule Of Restructuring And Related Costs [Text Block] Number of Financial Institutions Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Cost of revenue Cost Of Goods Total [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Customer Major Customers [Axis] Customer Name Of Major Customer [Domain] Customer One [Member] Customer One Customer One [Member] Revenue Sales Revenue Net [Member] Accounts Receivable Accounts Receivable [Member] Concentration of Credit Risk and Other Risks and Uncertainties Concentration Risk [Line Items] Number of financial institutions Number Of Financial Institutions Concentration risk, percentage Concentration Risk Percentage1 Disaggregation Of Revenue [Table] Disaggregation Of Revenue [Table] Timing of Transfer of Good or Service Timing Of Transfer Of Good Or Service [Axis] Timing of Transfer of Good or Service Timing Of Transfer Of Good Or Service [Domain] Transferred over time Transferred Over Time [Member] Product, Light Fixture Sales-Type Lease [Member] Light fixture sales-type lease Product Light Fixture Sales Type Lease [Member] Product, Sale Of Tax Credit [Member] Sale of tax credits Product Sale Of Tax Credit [Member] Product, Legacy Solar Facilities [Member] Legacy solar facilities Product Legacy Solar Facilities [Member] Disaggregation of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Revenues Revenue From Contract With Customer Including Assessed Tax Total revenue Revenue, Excluding Revenue From Contracts With Customers Federal Government [Member] Federal government Federal Government [Member] Commercial And Industrial [Member] Commercial and industrial Commercial And Industrial [Member] Lightning [Member] Total lighting Lightning [Member] Solar Energy [Member] Solar energy related revenues Solar Energy [Member] Total revenues from contracts with customers Revenue accounted for under other guidance Revenue Excluding Revenue From Contracts With Customers Total revenue Percentage of contract for sale equals monthly progress payments. Percentage of contract for sale equal monthly progress payments Percentage Of Contract For Sale Equals Monthly Progress Payments Proceeds from sale of unbilled contracts receivable. Gain (loss) on sale of unbilled contract revenue. Proceeds from sale of revenue earned but not billed Proceeds From Sale Of Unbilled Contracts Receivable Gain (loss) on sale of revenue earned but not billed Gain Loss On Sale Of Unbilled Contract Revenue Revenue, Practical Expedient, Initial Application and Transition, Nondisclosure of Transaction Price Allocation to Remaining Performance Obligation [true false] Revenue Practical Expedient Initial Application And Transition Nondisclosure Of Transaction Price Allocation To Remaining Performance Obligation Revenue, Practical Expedient, Financing Component [true false] Revenue Practical Expedient Financing Component Unbilled receivables. Unbilled accounts receivable Unbilled Receivables Contract liabilities Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress Contract assets Contract With Customer Asset Net Contract liabilities Contract With Customer Liability Change in contract with customer liability Change in contract asset reclassified to accounts receivable Contract With Customer Asset Reclassified To Receivable Change in contract liability Change In Contract With Customer Liability Revenue Initial Application Period Cumulative Effect Transition [Table] Revenue Initial Application Period Cumulative Effect Transition [Table] Accounting Standards Update 2014-09 Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Domain] Adjustments Difference Between Revenue Guidance In Effect Before And After Topic606 [Member] Balances without application of ASC 606 Calculated Under Revenue Guidance In Effect Before Topic606 [Member] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Statement of Financial Position [Abstract] Long-term debt, less current maturities Other Long Term Debt Noncurrent Income Statement [Abstract] Loss before income tax Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Income tax expense Statement of Cash Flows [Abstract] Accounts receivable, gross Accounts Receivable Gross Current Allowance for doubtful accounts Allowance For Doubtful Accounts Receivable Current Accounts receivable, net Cost Inventory Gross [Abstract] Raw materials and components Inventory Raw Materials And Supplies Work in process Inventory Work In Process Finished goods Inventory Finished Goods Total Inventory Gross Reserve Inventory Adjustments [Abstract] Raw materials and components Inventory Raw Materials And Supplies Valuation Reserves Work in process Inventory Work In Process Valuation Reserves Finished goods Inventory Finished Goods Valuation Reserves Total Inventory Valuation Reserves Net Inventory Net [Abstract] Raw materials and components Inventory Raw Materials And Supplies Net Of Reserves Work in process Inventory Work In Process Net Of Reserves Finished goods Inventory Finished Goods Net Of Reserves Total Unbilled accounts receivable Unbilled Receivables Current Other prepaid expenses Other Prepaid Expense Current Total Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Land and land improvements Land Improvements [Member] Buildings and building improvements Building And Building Improvements [Member] Furniture, fixtures and office equipment Furniture And Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Equipment leased to customers Equipment Leased To Other Party [Member] Plant equipment Equipment [Member] Construction in Progress Construction In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property and equipment Property Plant And Equipment Net [Abstract] Gross property and equipment Property Plant And Equipment Gross Less: accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Number of reportable segments Number Of Reportable Segments Schedule Of Capital Leased Asssets [Table] Schedule Of Capital Leased Asssets [Table] Assets Held under Capital Leases Assets Held Under Capital Leases [Member] Capital Leased Assets [Line Items] Capital Leased Assets [Line Items] Equipment Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Patents Patents [Member] Licenses Licensing Agreements [Member] Trade name and trademarks Trademarks And Trade Names [Member] Customer relationships Customer Relationships [Member] Developed technology Developed Technology Rights [Member] Non-competition agreements Noncompete Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Gross Carrying Amount Finite Lived And Indefinite Lived Intangible Assets Gross Accumulated Amortization Finite Lived Intangible Assets Accumulated Amortization Net Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Range Range [Axis] Range Range [Member] Minimum Minimum [Member] Weighted average Weighted Average [Member] Maximum Maximum [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Impairment of intangible assets Impairment Of Intangible Assets Excluding Goodwill Amortization expense Intangible assets, estimated economic useful life Finite Lived Intangible Asset Useful Life Finite-Lived Intangible Assets, Amortization Expense, Year Six Finite-Lived Intangible Assets, Amortization Expense, After Year Six Finite-Lived Intangible Assets, Estimated Amortization Expense Finite Lived Intangible Assets Future Amortization Expense [Abstract] Fiscal 2019 (period remaining) Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year Fiscal 2020 Finite Lived Intangible Assets Amortization Expense Year Two Fiscal 2021 Finite Lived Intangible Assets Amortization Expense Year Three Fiscal 2022 Finite Lived Intangible Assets Amortization Expense Year Four Fiscal 2023 Finite Lived Intangible Assets Amortization Expense Year Five Fiscal 2024 Finite Lived Intangible Assets Amortization Expense Year Six Thereafter Finite Lived Intangible Assets Amortization Expense After Year Six Total Finite Lived Intangible Assets Net Accrued Contract Costs, Current Contract With Customer, Customer Credit Liability, Current Compensation and benefits Employee Related Liabilities Current Accrued taxes Sales And Excise Tax Payable Current Contract costs Accrued Contract Costs Current Legal and professional fees Accrued Professional Fees Current Warranty Product Warranty Accrual Classified Current Sales returns reserve Contract With Customer Refund Liability Current Credits due to customers Contract With Customer Customer Credit Liability Current Other accruals Other Accrued Liabilities Current Total Limited Product Warranty, Term Limited warranty term Limited Product Warranty Term Standard And Extended Product Warranty Accrual, Increase (Decrease) Reclassification Adjustment Movement in Standard Product Warranty Accrual Movement In Standard Product Warranty Accrual Roll Forward Beginning of period Product Warranty Accrual Reclassification on adoption of ASC 606 Standard And Extended Product Warranty Accrual Increase Decrease Reclassification Adjustment Accruals Product Warranty Accrual Period Increase Decrease Warranty claims (net of vendor reimbursements) Product Warranty Accrual Payments End of period Numerator: Earnings Per Share Reconciliation [Abstract] Denominator: Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract] Weighted-average common shares outstanding (in shares) Weighted-average common shares and common share equivalents outstanding (in shares) Net loss per common share: Earnings Per Share Basic And Diluted [Abstract] Basic (USD per share) Diluted (USD per share) Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Common stock options Employee Stock Option [Member] Restricted shares Restricted Stock [Member] Number of potentially dilutive securities Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Potentially dilutive securities outstanding (in shares) Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Schedule Of Extinguishment Of Debt [Table] Schedule Of Extinguishment Of Debt [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Equipment lease obligations Capital Lease Obligations [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving credit facility Revolving Credit Facility [Member] Long-term debt Extinguishment Of Debt [Line Items] Long-term debt Long Term Debt By Current And Noncurrent [Abstract] Total long-term debt Long Term Debt Less current maturities Long-term debt, less current maturities Long Term Debt Noncurrent Line of Credit Facility, Additional Borrowing Capacity Line Of Credit Facility [Table] Line Of Credit Facility [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Credit Agreement Credit Agreement Credit Agreement [Member] Lender Name Line Of Credit Facility [Axis] Line of Credit Facility, Lender Line Of Credit Facility Lender [Domain] Western Alliance Bank [Member] Western Alliance Bank Western Alliance Bank [Member] Line of credit Line Of Credit [Member] Letter of credit Letter Of Credit [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] Prime rate Prime Rate [Member] Extinguishment of Debt Extinguishment Of Debt [Axis] Extinguishment of Debt, Type Extinguishment Of Debt Type [Domain] December 2014 orion throughput agreement finance program. December 2014 OTA Finance Program December2014 Orion Throughput Agreement Finance Program [Member] De Lage Landen Financial Services, Inc. [Member] De Lage Landen Financial Services, Inc. De Lage Landen Financial Services Inc [Member] Secured Debt Secured Debt [Member] Agreement with Wisconsin Department of Commerce [Member] Agreement with Wisconsin Department of Commerce Agreement With Wisconsin Department Of Commerce [Member] Line of Credit Facility [Line Items] Line Of Credit Facility [Line Items] Contractual term Debt Instrument Term Credit facility maturity date Line Of Credit Facility Expiration Date1 Credit facility, maximum limit Line Of Credit Facility Maximum Borrowing Capacity Proceeds from Lines of Credit Proceeds From Lines Of Credit Outstanding letters of credit Letters Of Credit Outstanding Amount Credit facility, additional borrowing capacity Line Of Credit Facility Additional Borrowing Capacity Line Of Credit Facility, Termination Fee Percentage Basis spread on variable rate Debt Instrument Basis Spread On Variable Rate1 Annual facility fee (as a percentage) Line Of Credit Facility Commitment Fee Percentage Termination fee (as a percentage) Line Of Credit Facility Termination Fee Percentage Interest rate Debt Instrument Interest Rate Effective Percentage Debt Instrument, Buyout Option Lease expiration month and year. Lease interest rate Debt Instrument Interest Rate Stated Percentage Lease agreement, principal amount Debt Instrument Carrying Amount Net equipment lease obligation buyout option Debt Instrument Buyout Option Lease expiration month and year Lease Expiration Month And Year Debt Instrument, Number of Customer Contracts Principal amount of secured debt Secured Debt Number of contracts for collateral (contract) Debt Instrument Number Of Contracts For Collateral Face amount of debt Debt Instrument Face Amount Income tax expense/(benefit) Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense (Benefit) Deferred tax assets Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit Unrecognized tax benefits Unrecognized Tax Benefits Rent expense under operating leases Operating Leases Rent Expense Net Employee stock purchase plans weighted averages purchase price of shares purchased. Class Of Treasury Stock [Table] Class Of Treasury Stock [Table] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Stock Compensation Plan Stock Compensation Plan [Member] Equity, Class of Treasury Stock [Line Items] Equity Class Of Treasury Stock [Line Items] Share issued under ESPP Stock Issued During Period Shares Employee Stock Purchase Plans Closing market price Employee Stock Purchase Plan Closing Market Price Of Shares Purchased Loans issued to non-executive employees outstanding Receivable From Shareholders Or Affiliates For Issuance Of Capital Stock Treasury stock acquired (shares) Treasury Stock Shares Acquired Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost Of Products [Member] Cost of product revenue Cost Of Products [Member] Cost Of Services [Member] Cost of service revenue Cost Of Services [Member] General and administrative General And Administrative Expense [Member] Sales and marketing Selling And Marketing Expense [Member] Research and development Research And Development Expense [Member] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Stock-based compensation Share Based Compensation Allocation And Classification In Financial Statements [Abstract] Total Allocated Share Based Compensation Expense Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Restricted Shares Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Beginning balance (shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Awards granted (shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Awards vested (shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Awards forfeited (shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Ending balance (shares) Per share price on grant date (USD per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Stock Options Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares Roll Forward Non-vested, beginning balance (shares) Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares Awards granted (shares) Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Awards vested (shares) Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares Awards forfeited (shares) Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares Non-vested, ending balance (shares) Per share price on grant date (USD per share) Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Deferred compensation arrangement with individual compensation expense period of recognition. Deferred stock-based compensation related to grants of restricted shares, period of recognition Deferred Compensation Arrangement With Individual Compensation Expense Period Of Recognition Deferred stock-based compensation related to grants of restricted shares Deferred Compensation Arrangement With Individual Compensation Expense Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate and Other Corporate Non Segment [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Engineered Systems Member Orion Engineered Systems Engineered Systems [Member] Distribution Services [Member] Orion Distribution Services Distribution Services [Member] U.S. Markets [Member] Orion U.S. Markets U S Markets [Member] Corporate and Other Operating Income (Loss) Schedule Of Restructuring And Related Costs [Table] Schedule Of Restructuring And Related Costs [Table] Restructuring Cost and Reserve [Line Items] Restructuring Cost And Reserve [Line Items] Total restructuring charges Restructuring Charges Restructuring Type Restructuring Cost And Reserve [Axis] Type of Restructuring Type Of Restructuring [Domain] Post-employment medical benefits Special Termination Benefits [Member] Payments for Restructuring Payments For Restructuring Restructuring Reserve Restructuring Reserve