Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Non-vested at March 31, 2016 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Non-vested at June 30, 2016 (shares) Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2003 Stock Option Two Thousand Three Stock Option [Member] Two thousand three stock option. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted shares Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Reserved shares for issuance to key employees (shares) Common Stock, Capital Shares Reserved for Future Issuance Shares of stock based compensation issued during the period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Stock issued in lieu of cash compensation (shares) Stock Issued During Period, Shares, Issued for Services Weighted-average per share price on grant date (usd per share) Share Based Compensation Arrangement By Share Based Payment Award Per Share Price Share based compensation arrangement by share based payment award per share price. Closing common stock price (usd per share) Fair Value Of Closing Common Stock Price Fair value of closing common stock price. Compensation cost related to non-vested common stock-based compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average expected term Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted-average per share price on grant date (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Deferred stock-based compensation related to grants of restricted shares, period of recognition Deferred Compensation Arrangement With Individual Compensation Expense 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 Accounting Policies [Abstract] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Financing Receivable Type [Axis] Financing Receivable Type [Axis] Financing Receivable Type [Axis] Financing Receivable Type [Domain] Financing Receivable Type [Domain] [Domain] for Financing Receivable Type [Axis] Not Past Due Not Past Due [Member] Not past due. 1-90 days past due One To Ninety Days [Member] One to ninety days. Greater than 90 days past due Greater Than Ninety Days [Member] Greater than ninety days. Total past due Past Due Lease Net [Member] Past due lease net. Total sales-type leases Sales Type Net [Member] Sales type net. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Credit quality of the Company's financing receivables using Aging Analysis Accounts, Notes, Loans and Financing Receivable, Classified [Abstract] Lease balances included in consolidated accounts receivable—current Accounts, Notes, Loans and Financing Receivable, Net, Current Lease balances included in consolidated accounts receivable—long-term Accounts, Notes, Loans and Financing Receivable, Net, Noncurrent Total gross sales-type leases Accounts Receivable, Gross, Current Allowance Allowance for Doubtful Accounts Receivable, Current Total net sales-type leases Accounts Receivable, Net, Current Segment Reporting [Abstract] SEGMENTS Segment Reporting Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Assets Held under Capital Leases Assets Held under Capital Leases [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Equipment Property, Plant and Equipment, Gross Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Debt Disclosure [Abstract] Schedule Of Extinguishment Of Debt [Table] Schedule of Extinguishment of Debt [Table] Extinguishment Of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment Of Debt Type [Domain] Extinguishment of Debt, Type [Domain] Revolving credit facility Revolving Credit Facility [Member] Harris seller's note Harris Seller's Note [Member] Harris Seller's Note [Member] Equipment lease obligations Capital Lease Obligations [Member] Customer equipment finance notes payable Customer Equipment Finance Notes Payable [Member] Customer equipment finance notes payable. Other long-term debt Other Long Term Debt [Member] Other long term debt. Extinguishment of Debt [Line Items] 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, Current Maturities Long-term debt, less current maturities Long-term Debt, Excluding Current Maturities Summary of the effect of net income per common share Income Statement [Abstract] Numerator: Earnings Per Share Reconciliation [Abstract] Net loss Net Income (Loss) Attributable to Parent Denominator: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted-average effect of assumed conversion of stock options and restricted shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average common shares and common share equivalents outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Net income (loss) per common share: Earnings Per Share [Abstract] Basic net income (loss) per share attributable to common shareholders (in dollars per share) Earnings Per Share, Basic Diluted net income (loss) per share (in dollars per share) Earnings Per Share, Diluted Concentration Risk [Table] Concentration Risk [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Orion Engineered Systems Engineered Systems [Member] Engineered Systems Member Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Cost of Sales Cost of Sales [Member] Sales Revenue, Services, Net Sales Revenue, Services, Net [Member] Accounts Receivable Accounts Receivable [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Supplier Concentration Risk Supplier Concentration Risk [Member] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Number of financial institutions (financial institution) Number of Financial Institutions Number of Financial Institutions Concentration risk, percentage Concentration Risk, Percentage Concentration risk, number of entities involved in risk calculation Concentration Risk, Number of Entities Involved in Risk Calculation Concentration Risk, Number of Entities Involved in Risk Calculation Product warranty accrual Standard and Extended Product Warranty Accrual Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization Amortization Stock-based compensation Share-based Compensation Loss on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Changes in inventory reserves Provision for inventory reserves Provision for inventory reserves Changes in bad debt reserves 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 Inventories Increase (Decrease) in Inventories Deferred contract costs Increase (Decrease) in Deferred Charges Prepaid expenses and other assets Increase (Decrease) in Prepaid 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 Deferred Revenue 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] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Net cash provided by (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 Payment of common stock issuance costs Payments of Stock Issuance Costs Payments to settle employee tax withholdings on stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Net proceeds from employee equity exercises Proceeds from Exercise of Warrants and Stock Options Proceeds from Exercise of Warrants and Stock Options Net cash (used in) provided by 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 Carrying Value 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] STOCK OPTIONS AND RESTRICTED SHARES Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] U.S. Markets Energy Management [Member] Energy Management Member. Engineered Systems Distribution Services Distribution Services [Member] Distribution Services [Member] Corporate and Other Corporate and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Corporate and Other Segment Reporting Information, Revenue for Reportable Segment [Abstract] Revenues Revenues Operating Income (Loss) Operating Income (Loss) Accounts receivable, gross Allowance for doubtful accounts Common stock options Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant [Roll Forward] Shares Available for Grant, Beginning Balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares Available for Grant, Granted to Employee (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Shares Issued to Employee Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Shares Issued to Employee Shares Available for Grant, Granted to Non-Employee (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Shares Issued to Non-Employee Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Shares Issued to Non-Employee Shares Available for Grant, Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Forfeited Shares Available for Grant, Ending Balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Shares, Beginning Balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of Shares, Granted (shares) Number of Shares, Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Number of Shares, Exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Shares, Ending Balance (shares) Number of Shares, Exercisable (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted Average Exercise Price, Beginning Balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price, Granted Stock Options (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Ending Balance (in dollars per share) Weighted Average Exercise Price, Exercisable Ending Balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term, Exercisable (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Ending Balance (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Exercisable (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Product revenue Sales Revenue, Goods, Net Service revenue Sales Revenue, Services, Net Total revenue Cost of product revenue Cost of Goods Sold Cost of service revenue Cost of Services Total cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] General and administrative General and Administrative Expense Sales and marketing Selling and Marketing Expense Research and development Research and Development Expense Total operating expenses Operating Expenses Loss from operations Other income (expense): Nonoperating Income (Expense) [Abstract] Other income Other Nonoperating Income Interest expense Interest Expense Interest income Investment Income, Interest Total other income (expense) Nonoperating Income (Expense) Loss before income tax Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax (benefit) expense Income Tax Expense (Benefit) Net loss and comprehensive loss Basic net loss per share attributable to common shareholders (in dollars per share) Diluted net loss per share (in dollars per share) Weighted-average common shares and share equivalents outstanding (in shares) 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 Property, Plant and Equipment, Other Types [Member] Construction in progress Construction in Progress [Member] Property and equipment Property, Plant and Equipment, Net [Abstract] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Summary of restricted shares granted to key employees Restricted Shares Issued to Key Employees [Abstract] Restricted shares issued to key employees. Balance at March 31, 2016 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares issued (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Shares forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Shares outstanding at June 30, 2016 (shares) 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 [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of product revenue 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] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Stock-based compensation Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Total Allocated Share-based Compensation Expense Stockholders' Equity Note [Abstract] Employee stock purchase plan activity Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] LONG-TERM DEBT Long-term Debt [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit Agreement Credit Agreement [Member] Credit Agreement December 2014 OTA Finance Program December 2014 OTA Finance Program [Member] December 2014 OTA Finance Program [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter of Credit Letter of Credit [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Wells Fargo Bank, National Association Wells Fargo Bank, National Association [Member] Wells Fargo Bank, National Association [Member] De Lage Landen Financial Services, Inc. De Lage Landen Financial Services, Inc. [Member] De Lage Landen Financial Services, Inc. [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] June 2011 OTA Finance Program June 2011 OTA Finance Program [Member] June 2011 OTA Finance Program [Member] Agreement with Wisconsin Department of Commerce Agreement with Wisconsin Department of Commerce [Member] Agreement with Wisconsin Department of Commerce [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Credit facility current limit Line of Credit Facility, Current Borrowing Capacity Credit facility, maximum limit Line of Credit Facility, Maximum Borrowing Capacity Credit facility, minimum indebtedness ratio Line of Credit Facility, Covenant Terms, Minimum Indebtedness Ratio Line of Credit Facility, Covenant Terms, Minimum Indebtedness Ratio Basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Interest payment Debt Instrument, Periodic Payment, Interest Interest rate (percent) Debt Instrument, Interest Rate, Effective Percentage Unused commitment fee (percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Letters of credit outstanding Letters of Credit Outstanding, Amount Revolving credit facility Long-term Line of Credit, Noncurrent Credit facility, additional borrowing capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Face amount of debt Debt Instrument, Face Amount Lease interest rate (percent) Debt Instrument, Interest Rate, Stated Percentage Number of lease agreement (lease agreement) Number of Lease Agreements Number of Lease Agreements Lease agreement, principal amount Long-term Debt, Gross Net equipment lease obligation buyout option Debt Instrument, Buyout Option Debt Instrument, Buyout Option Principal amount of secured debt Secured Debt Number of contracts for collateral (contract) Debt Instrument, Number Of Contracts For Collateral Debt Instrument, Number of Customer Contracts Period of time without interest accruing or principal payments due Period of Time without Interest Accruing or Principal Payments Due Period of Time without Interest Accruing or Principal Payments Due Periodic payment Debt Instrument, Periodic Payment Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Name [Domain] Sale Leaseback Transaction, Name [Domain] Agreement with Tramontina U.S. Cookware, Inc. Agreement with Tramontina U.S. Cookware, Inc. [Member] Agreement with Tramontina U.S. Cookware, Inc. [Member] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Rent expense under operating leases Operating Leases, Rent Expense, Net Term of operating lease Lessor Leasing Arrangements, Operating Leases, Term of Contract Number of lease term extensions (extension option) Lessor Leasing Arrangements, Operating Leases, Number of Extension Options Lessor Leasing Arrangements, Operating Leases, Number of Extension Options Renewal term of operating lease Lessor Leasing Arrangements, Operating Leases, Renewal Term Monthly rental payments receivable Operating Leases, Monthly Rental Payments Receivable Operating Leases, Monthly Rental Payments Receivable Cash purchase price of sale leaseback Sale Leaseback Transaction, Net Proceeds, Investing Activities Area of leased building (sqft) Sale Leaseback Transaction, Area of Leased Property Sale Leaseback Transaction, Area of Leased Property Building lease term Sale Leaseback Transaction, Lease Term Sale Leaseback Transaction, Lease Term Rent expense per square feet Sale Leaseback Transaction, Rent Expense Per Square Foot Sale Leaseback Transaction, Rent Expense Per Square Foot Monthly rental payment Sale Leaseback Transaction, Monthly Rental Payments Number of plaintiff's claims dismissed (claim) Loss Contingency, Claims Dismissed, Number Amount of settlement Litigation Settlement, Amount Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Cash and cash equivalents Accounts receivable, net 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 Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Long-term accounts receivable Accounts Receivable, Net, Noncurrent Other long-term assets Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Accounts payable Accounts Payable, Current Accrued expenses and other Accrued Liabilities, Current Deferred revenue, current Deferred Revenue, Current Current maturities of long-term debt and capital leases Total current liabilities Liabilities, Current Long-term debt and capital leases, less current maturities Other Long-term Debt, Noncurrent Deferred revenue, long-term Deferred Revenue, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value: Shares authorized: 30,000,000 at June 30, 2016 and March 31, 2016; no shares issued and outstanding at June 30, 2016 and March 31, 2016 Preferred Stock, Value, Issued Common stock, no par value: Shares authorized: 200,000,000 at June 30, 2016 and March 31, 2016; shares issued: 37,517,419 and 37,192,559 at June 30, 2016 and March 31, 2016; shares outstanding: 28,091,049 and 27,767,138 at June 30, 2016 and March 31, 2016 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock: 9,426,370 and 9,425,421 common shares at June 30, 2016 and March 31, 2016 Treasury Stock, Value Shareholder notes receivable Receivable from Shareholders or Affiliates for Issuance of Capital Stock Retained deficit Retained Earnings (Accumulated Deficit) Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Inventories Inventory, Net, Items Net of Reserve Alternative [Abstract] Raw material and components, cost Inventory, Raw Materials and Supplies, Gross Raw material and components, obsolescence reserve Inventory, Raw Materials and Supplies, Valuation Reserves Inventory, Raw Materials and Supplies, Valuation Reserves Raw material and components, net Inventory, Raw Materials and Supplies, Net of Reserves Work in process, cost Inventory, Work in Process, Gross Work in process, obsolescence reserve Inventory, Work in Process, Valuation Reserves Inventory, Work in Process, Valuation Reserves Work in process, net Inventory, Work in Process, Net of Reserves Finished goods, cost Inventory, Finished Goods, Gross Finished goods, obsolescence reserve Inventory, Finished Goods, Valuation Reserves Inventory, Finished Goods, Valuation Reserves Finished goods, net Inventory, Finished Goods, Net of Reserves Cost Inventory, Gross Obsolescence reserve Inventory Valuation Reserves Net Long-term debt Schedule of Debt [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] 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 agreement Noncompete Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Intangible assets, estimated economic useful life (years) Finite-Lived Intangible Asset, Useful Life Gross Carrying Amount Finite-Lived and Indefinite-Lived Intangible Assets, Gross Finite-Lived and Indefinite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Estimated Amortization Expense Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Fiscal 2017 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Fiscal 2018 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Fiscal 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two Fiscal 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three Fiscal 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four Fiscal 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Finite-Lived Intangible Assets, Net Principles of Consolidation Consolidation, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Financing Receivables Finance, Loans and Leases Receivable, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Deferred Contract Costs Deferred Charges, Policy [Policy Text Block] Prepaid Expenses and Other Current Assets Prepaid Expenses And Other Current Assets (Policy Text Block) Prepaid Expenses And Other Current Assets Policy Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Other Long-Term Assets Other Long Term Assets [Policy Text Block] Other Long-Term Assets Accrued Expenses and Other Accrued Expenses [Policy Text Block] Accrued Expenses, Policy Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Net Loss per Common Share Earnings Per Share, Policy [Policy Text Block] Concentration of Credit Risk and Other Risks and Uncertainties Concentration Risk, Credit Risk, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Entity that Current Director Owns Minority Interest and Serves as Board of Directors Chairman Entity that Current Director Owns Minority Interest and Serves as Board of Directors Chairman [Member] Entity that Current Director Owns Minority Interest and Serves as Board of Directors Chairman [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Purchases from related party Related Party Transaction, Purchases from Related Party Shares Issued Under ESPP Plan (shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Closing Market Price (usd per share) Employee Stock Purchase Plan Closing Market Price Of Shares Purchased Employee stock purchase plans weighted averages purchase price of shares purchased. Shares Issued Under Loan Program (shares) Employee Stock Purchase Plans Debt Structure Shares Issued Employee stock purchase plans debt structure shares issued. Dollar Value of Loans Issued Employee Stock Purchase Plans Debt Structure Direct Loan Amount Employee stock purchase plans debt structure direct loan amount. Repayment of Loans Employee Stock Purchase Plans Debt Structure Direct Loan Repayment Amount Employee stock purchase plans debt structure direct loan repayment amount. Loans issued to non-executive employees outstanding Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Preferred Stock, Shares Outstanding Common stock, par value (usd per share) Common Stock, No Par Value Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, shares issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Shares, Outstanding Treasury stock, shares (shares) Treasury Stock, Shares Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key 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 Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Deferred financing costs Debt Issuance Costs, Noncurrent, Net Security deposits Security Deposit Other Other Assets, Miscellaneous, Noncurrent Total Schedule of accounts receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of financing receivables Financing Receivable Credit Quality Indicators [Table Text Block] Inventories Schedule of Inventory, Current [Table Text Block] Prepaid expenses and other current assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Property and equipment Property, Plant and Equipment [Table Text Block] Schedule of equipment under capital leases Schedule of Capital Leased Assets [Table Text Block] Schedule of intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of other long-term assets Schedule of Other Assets, Noncurrent [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 [Table Text Block] SHAREHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Unbilled accounts receivable Unbilled Receivables, Current Other prepaid expenses Other Prepaid Expense, Current Total Buildings and building improvements Leasehold improvements Leaseholds and Leasehold Improvements [Member] Equipment leased to customers under Power Purchase Agreements Plant equipment Equipment [Member] Depreciation using the straight-line method Property, plant and equipment, useful life (years) Property, Plant and Equipment, Useful Life Property, plant and equipment estimated useful life Property Plant And Equipment Estimated Useful Life Property plant and equipment estimated useful life. Segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal Domestic Tax Authority [Member] State State and Local Jurisdiction [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Income Taxes (Textual) [Abstract] Income Tax (Textual) [Abstract] Income tax textual. Estimated effective income tax rate Effective Income Tax Rate Reconciliation, Percent Increase in tax rate Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Net tax rate Effective Income Tax Rate Reconciliation, Net of Discrete Tax Items, Percent Effective Income Tax Rate Reconciliation, Net of Discrete Tax Items, Percent Operating loss carryforwards Operating Loss Carryforwards Exercise of NQSOs Operating Loss Carryforwards Associated with Exercise of Non Qualified Stock Options Exercise of non qualified stock options. Tax credit carryforwards Tax Credit Carryforward, Amount Valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Unrecognized tax benefits Unrecognized Tax Benefits Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] High Intensity Fluorescent Lighting Products High Intensity Fluorescent Lighting Products [Member] High Intensity Fluorescent Lighting Products [Member] Accounts receivable are due, minimum period (days) Accounts Receivables Due Minimum Period Accounts receivables due minimum period. Accounts receivable are due, maximum period (days) Accounts Receivables Due Maximum Period Accounts receivables due maximum period. Length of time of inventory usage considered for inventory reserve (months) Inventory Reserve, Length of Time of Inventory Usage Considered Inventory Reserve, Length of Time of Inventory Usage Considered Amortization Amortization of Intangible Assets Limited warranty term (years) Limited Warranty, Term Limited Warranty, Term Power purchase agreement product revenue is recognized term (years) Power Purchase Agreement Product Revenue Recognizable Term Power purchase agreement product revenue recognizable term. Stock-based compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of share based payment awards Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Summary of outstanding non-vested stock options Schedule of Nonvested Share Activity [Table Text Block] Summary of restricted shares granted Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Compensation and benefits Employee-related Liabilities, Current Sales tax Sales and Excise Tax Payable, Current Contract costs Accrued Contract Costs, Current Accrued Contract Costs, Current Legal and professional fees Accrued Professional Fees, Current Warranty Product Warranty Accrual, Current Other accruals Other Accrued Liabilities, Current Total Loss contingency Loss Contingency Accrual 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 [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Number of potentially dilutive securities Antidilutive Shares Excluded From Computation Of Earnings Per Share [Abstract] Antidilutive Shares excluded from computation of earnings per share. Potentially dilutive securities outstanding (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Product Warranty Liability [Table] Product Warranty Liability [Table] Product Warranty Liability [Line Items] Product Warranty Liability [Line Items] Changes in warranty accrual Product Warranties Disclosures [Abstract] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Beginning of period Provision to product cost of revenue Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Charges Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties End of period