Payables and Accruals [Abstract] Accrued compensation Employee-related Liabilities, Current Claims reserve Claims Reserve Claims Reserve Accrued sub-contracts Accrued Sub Contracts, Current Accrued Sub Contracts, Current Accrued professional fees Accrued Professional Fees, Current Deferred rent Accrued Rent, Current Royalties Accrued Royalties, Current Warranty reserve Product Warranty Accrual, Current Accrued liabilities - other Other Accrued Liabilities, Current Total accrued liabilities Accrued Liabilities, Current Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Equity [Abstract] Summary of Activity for Stock and Equity Incentive Plans Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Restricted Stock Awards and Units Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Details of Equity Transactions Schedule of Stockholders Equity [Table Text Block] Accounting Policies [Abstract] Number of reportable segments Number of Reportable Segments Antidilutive securities excluded from computation of net loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Inventory Disclosure [Abstract] Finished goods Inventory, Finished Goods, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Raw materials Inventory, Raw Materials, Net of Reserves Total inventory Inventory, Net Components of Inventory Schedule of Inventory, Current [Table Text Block] Nature of Operations Nature Of Operations [Policy Text Block] Nature Of Operations Unaudited Interim Financial Information Basis of Accounting, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Net Loss Per Share Earnings Per Share, Policy [Policy Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Authorized share repurchase amount Stock Repurchase Program, Authorized Amount Amount of stock repurchased Treasury Stock, Value, Acquired, Cost Method Treasury shares repurchased (in shares) Treasury Stock, Shares, Acquired Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Statement of Cash Flows [Abstract] Dividend on preferred stock, shares of common stock issuable (in shares) Dividend On Preferred Stock, Shares Of Common Stock Issuable Dividend On Preferred Stock, Shares Of Common Stock Issuable Segment Reporting [Abstract] Number of operating segments Number of Operating Segments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenues Sales [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Government Contracts Concentration Risk Government Contracts Concentration Risk [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Customer Concentration Risk Customer Concentration Risk [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] U.S. Government United States Government [Member] United States Government [Member] Major Customer One Major Customer One [Member] Major Customer One [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Outside of the United States Non-US [Member] China CHINA Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Percentage of total consolidated revenues by customer Concentration Risk, Percentage Debt Disclosure [Abstract] Summary of Debt Outstanding Schedule of Debt [Table Text Block] Schedule of Remaining Principal Payments Under the Term Loan Schedule of Maturities of Long-term Debt [Table Text Block] Inventory Inventory Disclosure [Text Block] Operating Segments Segment Reporting Disclosure [Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key 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 Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Number of Unvested Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Repurchased (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Repurchases In Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Repurchases in Period Ending balance (in shares) Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in 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 Vested (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average fair value, Repurchased (in usd per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Repurchases In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Repurchases In Period, Weighted Average Grant Date Fair Value Ending balance (in usd per share) Aggregate Value of Unvested Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract] Aggregate value of shares, Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Aggregate value of shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Aggregate Intrinsic Value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Aggregate Intrinsic Value, Granted Aggregate value of shares, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Aggregate value of shares, Repurchased Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Nonvested, Aggregate Intrinsic Value, Repurchased Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Aggregate Intrinsic Value, Repurchased Aggregate value of shares, Ending balance Income Statement [Abstract] Revenues: Revenue, Net [Abstract] Technology development Contracts Revenue Products and licensing Product And License Revenues Product and license revenues Total revenues Revenue, Net Cost of revenues: Cost of Revenue [Abstract] Technology development Contract Revenue Cost Products and licensing Product And License Costs Product and license costs Total cost of revenues Cost of Revenue Gross profit Gross Profit Operating expense: Operating Expenses [Abstract] Selling, general and administrative Selling, General and Administrative Expense Research, development and engineering Research and Development Expense Total operating expense Operating Expenses Operating loss Operating Income (Loss) Other income/(expense): Nonoperating Income (Expense) [Abstract] Other income, net Other Nonoperating Income (Expense) Interest expense Interest Income (Expense), Nonoperating, Net Total other expense Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Preferred stock dividend Preferred Stock Dividends, Income Statement Impact Net loss attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Net loss per share attributable to common stockholders: Earnings Per Share [Abstract] Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Weighted average common shares and common equivalent shares outstanding: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Technology development Technology Development [Member] Technology Development [Member] Products and licensing Product And Licensing [Member] Product and Licensing [Member] Total operating income (loss) Depreciation Depreciation Amortization Amortization of Intangible Assets Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net Accounts Receivable, Net, Current Inventory 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 Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Other assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of long-term debt obligations Long-term Debt, Current Maturities Current portion of capital lease obligations Capital Lease Obligations, Current Accounts payable Accounts Payable, Current Accrued liabilities Deferred revenue Other Deferred Credits, Current Total current liabilities Liabilities, Current Long-term deferred rent Deferred Rent Credit, Noncurrent Long-term debt obligations Long-term Debt, Excluding Current Maturities Long-term capital lease obligations Capital Lease Obligations, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value $0.001, 1,321,514 shares authorized, issued and outstanding at March 31, 2017 and December 31, 2016 Preferred Stock, Value, Issued Common stock, par value $0.001, 100,000,000 shares authorized, 27,989,104 and 27,988,104 shares issued, 27,542,277 and 27,541,277 shares outstanding at March 31, 2017 and December 31, 2016 Common Stock, Value, Issued Treasury stock at cost, 446,827 shares at March 31, 2017 and December 31, 2016 Treasury Stock, Value Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Capital Stock and Share-Based Compensation Stockholders' Equity Note Disclosure [Text Block] Schedule of Revenues, Operating Loss and Assets for Reportable Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Equity Components [Axis] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Carilion Clinic Carilion Clinic [Member] Carilion Clinic [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A Preferred Stock Series A Preferred Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Stockholder's equity beginning balance Preferred stock beginning balance (in shares) Preferred Stock, Shares Outstanding Common stock beginning balance (in shares) Common Stock, Shares, Outstanding Treasury stock beginning balance (in shares) Treasury Stock, Shares Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Share-based compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Non-cash compensation Stock Issued During Period, Value, Restricted Stock Award, Gross Non-cash compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Stock dividends to Carilion Clinic Stock Issued During Period, Value, Stock Dividend Stock dividends to Carilion Clinic (in shares) Stock Dividends, Shares Forfeitures of restricted stock grants Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Forfeitures of restricted stock grants (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Repurchase of common stock Stock Repurchased During Period, Value Repurchase of common stock (in shares) Preferred stock ending balance (in shares) Common stock ending balance (in shares) Treasury stock ending balance (in shares) Stockholder's equity ending balance Accrued dividends Dividends Payable Stock dividends for preferred shareholders (in shares) Dividends Preferred Stock, Shares The dividends on the preferred stock are paid in common stock shares. Options Outstanding, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning Balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised (in shares) Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Ending Balance (shares) Price per Share Range Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Roll Forward] Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Roll Forward] Outstanding, lower limit (in usd per share) Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Limit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Limit Outstanding, upper limit (in usd per share) Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Limit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Limit Exercised (in usd per share) Share Based Compensation Shares Authorized Under Stock Option Plans Exercised In Period Exercise Price Range Upper Range Limit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercised in Period, Exercise Price Range, Upper Range Limit Canceled, lower limit (in usd per share) Share Based Compensation Shares Authorized Under Stock Option Plans Forfeitures In Period Exercise Price Range Lower Range Limit Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures in Period, Exercise Price Range, Lower Range Limit Canceled, upper limit (in usd per share) Share Based Compensation Shares Authorized Under Stock Option Plans Forfeitures In Period Exercise Price Range Upper Range Limit Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures in Period, Exercise Price Range, Upper Range Limit Outstanding, lower limit (in usd per share) Outstanding, upper limit (in usd per share) Options Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning Balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Ending Balance (in usd per share) Additional Disclosures Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Options Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options Exercisable, Number of Shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options Exercisable, Weighted Average Exercise Price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Commitments and Contingencies Disclosure [Abstract] Contingencies and Guarantees Commitments and Contingencies Disclosure [Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Total segment assets: Total assets Property plant and equipment, and intangible assets 2017 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three Silicon Valley Bank Term Loan Long-term Debt Debt Debt Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan Medium-term Notes [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Silicon Valley Bank Silicon Valley Bank [Member] Silicon Valley Bank [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Prime Rate Prime Rate [Member] Loan Restructuring Modification Name [Axis] Loan Restructuring Modification Name [Axis] Loan Restructuring Modification Name [Domain] Loan Restructuring Modification Name [Domain] Sixth Loan Modification Agreement Sixth Loan Modification Agreement [Member] Sixth Loan Modification Agreement [Member] Seventh Loan Modification Agreement Seventh Loan Modification Agreement [Member] Seventh Loan Modification Agreement [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt, face amount Debt Instrument, Face Amount Debt, number of monthly payment Debt Instrument Number Of Periodic Payment Debt Instrument, Number of Periodic Payment Debt, additional interest above prime rate Debt Instrument, Basis Spread on Variable Rate Early termination fee Debt Instrument, Early Termination Fee, Percentage Debt Instrument, Early Termination Fee, Percentage Debt, monthly principal payments Debt Instrument, Periodic Payment, Principal Minimum cash balance Debt Instrument, Restrictive Covenant, Minimum Cash Balance Debt Instrument, Restrictive Covenant, Minimum Cash Balance Liquidity covenant component, accounts receivable percentage Debt Instrument, Covenant Terms, Liquidity Covenant, Accounts Receivable Component, Percentage Debt Instrument, Covenant Terms, Liquidity Covenant Component, Accounts Receivable, Percentage Liquidity covenant component, outstanding principal loan balance multiplier Debt Instrument, Covenant Terms, Liquidity Covenant Component, Outstanding Principal Loan Balance Multiplier Debt Instrument, Covenant Terms, Liquidity Covenant Component, Outstanding Principal Loan Balance Multiplier Silicon Valley Bank Term Loan Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Cash flows provided by/(used in) 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 to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Share-based compensation Share-based Compensation Bad debt expense Provision for Doubtful Accounts Change in assets and liabilities Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Other current assets Increase (Decrease) in Other Current Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Net cash provided by/(used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of property and equipment Payments to Acquire Property, Plant, and Equipment Intangible property costs Payments to Acquire Intangible Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Payments on capital lease obligations Repayments of Long-term Capital Lease Obligations Payments of debt obligations Repayments of Debt Proceeds from the exercise of options Proceeds from Stock Options Exercised 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—beginning of period Cash and cash equivalents—end of period Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes Income Taxes Paid Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Dividend on preferred stock, 19,823 shares of common stock issuable for the three months ended March 31, 2017 and 2016 Dividend On Preferred Stock, Value Of Common Stock Issuable Dividend On Preferred Stock, Value Of Common Stock Issuable Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Director Compensation Plan Employee Director Compensation Plan [Member] Employee Director Compensation Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of RSUs Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Vested (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Vested Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Vested Forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures Converted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Other Ending balance (in shares) Forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Converted (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Converted In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Converted In Period Forfeitures (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Converted (in usd per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Converted, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Converted, Weighted Average Grant Date Fair Value Intrinsic value, outstanding Intrinsic value, unvested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized (in shares) Common Stock, Shares Authorized Common stock, issued (in shares) Common Stock, Shares, Issued Common stock, outstanding (in shares) Treasury Stock (in shares) Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Stock options granted (in shares) Aggregate outstanding stock options (in shares) Outstanding stock options, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Exercisable stock options (in shares) Exercisable stock options, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Stock-based compensation expense not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average remaining service period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Loss Contingencies [Table] Loss Contingencies [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Preliminary Audit Report Unfavorable Regulatory Action [Member] Legal Entity of Counterparty, Type [Axis] Legal Entity of Counterparty, Type [Axis] Legal Entity Type of Counterparty [Domain] Legal Entity Type of Counterparty [Domain] Defense Contract Audit Agency Government [Member] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Domain] Purchase Commitment, Excluding Long-term Commitment [Domain] Tunable Lasers Tunable Lasers [Member] Tunable Lasers [Member] Amplifiers Amplifiers [Member] Amplifiers [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Claimed cost, subject to potential penalty Loss Contingency, Estimate of Possible Loss Litigation settlement, offered, amount Litigation Settlement, Offered, Amount Litigation Settlement, Offered, Amount Number of non-cancelable purchase orders executed Number of Purchase Commitments Executed Number of Purchase Commitments Executed Non-cancelable purchase order commitment Contractual Obligation Non-cancelable purchase order delivery period Significant Purchase Commitment Time Period Significant Purchase Commitment, Time Period Non-cancelable purchase order commitment remaining Purchase Commitment, Remaining Minimum Amount Committed Less: unamortized debt issuance costs Unamortized Debt Issuance Expense Less: current portion Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block]