Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
High Speed Optical Receivers Business
High Speed Optical Receivers Business [Member]
High Speed Optical Receivers Business [Member]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Disposed of by Sale
Discontinued Operations, Disposed of by Sale [Member]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Product Concentration Risk
Product Concentration Risk [Member]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Revenues
Sales Revenue, Net [Member]
Cost of Revenues
Cost of Goods, Total [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Initial purchase price
Disposal Group, Including Discontinued Operation, Consideration, Gross
Disposal Group, Including Discontinued Operation, Consideration, Gross
Proceeds from sales of discontinued operations
Proceeds from Divestiture of Businesses
Placed in escrow
Disposal Group, Including Discontinued Operation, Consideration, Escrow
Disposal Group, Including Discontinued Operation, Consideration, Escrow
Concentration risk
Concentration Risk, Percentage
Cash flows used in operating activities for discontinued operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Cash flows used in investing activities for discontinued operations
Cash Provided by (Used in) Investing Activities, Discontinued Operations
Debt Disclosure [Abstract]
2018 (remaining six months)
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year
2019
Long-term Debt, Maturities, Repayments of Principal in Year Two
Silicon Valley Bank Term Loan
Long-term Debt
Discontinued Operations
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Subsequent Events [Abstract]
Components of Discontinued Operations
Disposal Groups, Including Discontinued Operations [Table Text Block]
Subsequent Event [Table]
Subsequent Event [Table]
Optoelectronic Components and Subassemblies
Optoelectronic Components And Subassemblies [Member]
Optoelectronic Components And Subassemblies [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Current assets
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]
Accounts receivable
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net
Contract assets
Disposal Group, Including Discontinued Operation, Contract Assets, Current
Disposal Group, Including Discontinued Operation, Contract Assets, Current
Inventory
Disposal Group, Including Discontinued Operation, Inventory, Current
Prepaid expenses and other current assets
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current
Total current assets
Disposal Group, Including Discontinued Operation, Assets, Current
Property and equipment, net
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent
Intangible assets, net
Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent
Goodwill
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent
Other assets
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent
Total assets of the disposal group
Disposal Group, Including Discontinued Operation, Assets
Current liabilities
Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract]
Accounts payable
Disposal Group, Including Discontinued Operation, Accounts Payable, Current
Accrued compensation
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current
Contract Liabilities
Disposal Group, Including Discontinued Operation, Contract Liabilities, Current
Disposal Group, Including Discontinued Operation, Contract Liabilities, Current
Other accrued liabilities
Disposal Group, Including Discontinued Operation, Other Liabilities, Current
Total current liabilities
Disposal Group, Including Discontinued Operation, Liabilities, Current
Deferred rent
Disposal Group, Including Discontinued Operation, Deferred Revenue, Noncurrent
Total liabilities of the disposal group
Disposal Group, Including Discontinued Operation, Liabilities
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]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Products and licensing
Product And Licensing Segment [Member]
Product and Licensing Segment [Member]
Discontinued Operations
Discontinued Operations [Member]
Revenues
Sales [Member]
Government Contracts Concentration Risk
Government Contracts Concentration Risk [Member]
Geographic Concentration Risk
Geographic Concentration Risk [Member]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
U.S. Government
United States Government [Member]
United States Government [Member]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
Outside of the United States
Non-US [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Depreciation
Depreciation
Amortization
Amortization of Intangible Assets
Percentage of total consolidated revenues by customer
Debt
Debt Disclosure [Text Block]
Revenue from Contract with Customer [Abstract]
Contract Balances
Revenue from Contract with Customer [Text Block]
Net revenues
Disposal Group, Including Discontinued Operation, Revenue
Cost of revenues
Disposal Group, Including Discontinued Operation, Costs of Goods Sold
Gross profit
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)
Operating expense
Disposal Group, Including Discontinued Operation, Income Statement Disclosures, Operating Expense [Abstract]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures, Operating Expense [Abstract]
Selling, general and administrative
Disposal Group, Including Discontinued Operation, General and Administrative Expense
Research, development and engineering
Disposal Group, Including Discontinued Operation, Research, Development And Engineering
Disposal Group, Including Discontinued Operation, Research, Development And Engineering
Total operating expense
Disposal Group, Including Discontinued Operation, Operating Expense
Operating income
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Other expenses
Disposal Group, Including Discontinued Operation, Other Expense (Income)
Disposal Group, Including Discontinued Operation, Other Expense (Income)
Income tax expense
Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period
Income attributable to disposal group
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax
Equity [Abstract]
Expected dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Aggregate outstanding stock options (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
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)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Exercisable stock options, weighted average remaining contractual term
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Fair value of shares vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Fair value of options exercised during period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Share-based compensation
Share-based Compensation
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
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]
Employee Director Compensation Plan
Employee Director Compensation Plan [Member]
Employee Director Compensation Plan [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Maximum
Maximum [Member]
Title of Individual [Axis]
Title of Individual [Axis]
Relationship to Entity [Domain]
Relationship to Entity [Domain]
Employees
Employees [Member]
Employees [Member]
Directors
Director [Member]
Award Type [Axis]
Award Type [Axis]
Equity Award [Domain]
Equity Award [Domain]
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Shares vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Vesting period, earlier of grant anniversary, or annual stockholders' meeting
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Shares not yet vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Initial purchase price
Disposal Group, Including Discontinued Operation, Consideration
Contingent consideration on discontinued operation
Disposal Group, Including Discontinued Operation, Contingent Consideration
Disposal Group, Including Discontinued Operation, Contingent Consideration
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]
Operating Segments
Segment Reporting Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Cash flows used in operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income/(loss)
Net Income (Loss) Attributable to Parent
Adjustments to reconcile net income/(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
Bad debt expense
Provision for Doubtful Accounts
Gain on disposal of fixed assets
Gain (Loss) on Disposition of Property Plant Equipment
Change in assets and liabilities
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Contract assets
Increase (Decrease) in Contract with Customer, Asset
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
Contract liabilities
Increase (Decrease) in Contract with Customer, Liability
Net cash 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
Proceeds from sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
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
Repurchase of common stock
Payments for Repurchase of Common Stock
Proceeds from the exercise of options and warrants
Proceeds from Issuance or Sale of Equity
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, at Carrying Value
Cash and cash equivalents—end of period
Supplemental disclosure of cash flow information
Supplemental Cash Flow Information [Abstract]
Cash paid for interest
Interest Paid, Including Capitalized Interest, Operating and Investing Activities
Cash paid for income taxes
Income Taxes Paid
Non-cash investing and financing activities
Noncash Investing and Financing Items [Abstract]
Dividend on preferred stock, 39,646 shares of common stock issuable for the six months ended June 30, 2018 and 2017
Dividend On Preferred Stock, Value Of Common Stock Issuable
Dividend On Preferred Stock, Value Of Common Stock Issuable
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Term Loan One
Term Loan One [Member]
Term Loan One [Member]
Term Loan Two
Term Loan Two [Member]
Term Loan Two [Member]
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]
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]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Prime Rate
Prime Rate [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, monthly principal payments
Debt Instrument, Periodic Payment, Principal
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
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
Aggregate term loan balance
Effective interest rate
Debt Instrument, Interest Rate, Effective Percentage
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
Statement of Financial Position [Abstract]
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)
Preferred Stock, Shares Outstanding
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)
Common Stock, Shares, Outstanding
Treasury Stock (in shares)
Treasury Stock, Shares
Summary of Stock Option Activity
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]
Authorized share repurchase amount
Stock Repurchase Program, Authorized Amount
Treasury shares repurchased (in shares)
Treasury Stock, Shares, Acquired
Amount of stock repurchased
Treasury Stock, Value, Acquired, Cost Method
Accounting Policies [Abstract]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Domain]
Initial Application Period Cumulative Effect Transition [Domain]
Adjustments
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
As Reported
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2014-09
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Assets
Assets [Abstract]
Contract assets
Contract with Customer, Asset, Net, Current
Inventory
Inventory, Net
Liabilities:
Liabilities [Abstract]
Contract liabilities
Contract with Customer, Liability
Stockholders’ equity:
Stockholders' Equity Attributable to Parent [Abstract]
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Restatement [Axis]
Restatement [Axis]
Restatement [Domain]
Restatement [Domain]
Scenario, Previously Reported
Previously Reported [Member]
Restatement Adjustment
Restatement Adjustment [Member]
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]
Accumulated Deficit
Retained Earnings [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]
Preferred stock beginning balance (in shares)
Common stock beginning balance (in shares)
Treasury stock beginning balance (in shares)
Stockholder's equity beginning balance
Stockholders' Equity Attributable to Parent
Impact of change in accounting policy, Preferred stock balance (in shares)
Impact of change in accounting policy, Common stock balance (in shares)
Impact of change in accounting policy, Treasury stock balance (in shares)
Impact of change in accounting policy, Stockholder's equity adjusted balance
Exercise of stock options (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise of stock options
Stock Issued During Period, Value, Stock Options Exercised
Share-based compensation (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Share-based compensation
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Non-cash compensation (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Gross
Non-cash compensation
Stock Issued During Period, Value, Restricted Stock Award, Gross
Stock dividends to Carilion Clinic (in shares)
Stock Dividends, Shares
Stock dividends to Carilion Clinic
Stock Issued During Period, Value, Stock Dividend
Net Income
Purchase of treasury stock (in shares)
Purchase of treasury stock
Stock Repurchased During Period, Value
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.
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
United States
UNITED STATES
Asia
Asia [Member]
Europe
Europe [Member]
Canada, Central and South America
Canada, Central, And South America [Member]
Canada, Central, And South America [Member]
All Others
Other Countries [Member]
Other Countries [Member]
Sales to the U.S. government
U.S. direct commercial sales and other
United States Direct Commercial Sales And Other [Member]
United States Direct Commercial Sales And Other [Member]
Foreign commercial sales & other
Foreign Commercial Sales And Other [Member]
Foreign Commercial Sales And Other [Member]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Domain]
Contract with Customer, Basis of Pricing [Domain]
Fixed-price contracts
Fixed-price Contract [Member]
Cost-type contracts
Cost-Type Contract [Member]
Cost-Type Contract [Member]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Domain]
Timing of Transfer of Good or Service [Domain]
Goods transferred at a point in time
Transferred at Point in Time [Member]
Goods/services transferred over time
Transferred over Time [Member]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Technology Development
Products And Services, Technology Development [Member]
Products And Services, Technology Development [Member]
Optical Test and Measurement Systems
Products And Services, Optical Test And Measurement Systems [Member]
Products And Services, Optical Test And Measurement Systems [Member]
Optical Components and Sub-assemblies
Products And Services, Optical Components And Sub-Assemblies [Member]
Products And Services, Optical Components And Sub-Assemblies [Member]
Other
Products And Services, Other [Member]
Products And Services, Other [Member]
Technology development
Technology Development Segment [Member]
Technology Development Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Total revenues
Revenue from Contract with Customer, Excluding Assessed Tax
Technology development
Technology Development [Member]
Technology Development [Member]
Products and licensing
Products And Licensing [Member]
Products And Licensing [Member]
Balances without adoption of Topic 606
Revenues:
Revenues [Abstract]
Cost of revenues:
Cost of Revenue [Abstract]
Total cost of revenues
Cost of Goods and Services Sold
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 income/(loss)
Operating Income (Loss)
Other income/(expense):
Nonoperating Income (Expense) [Abstract]
Investment income
Investment Income, Nonoperating
Other income/(expense)
Other Nonoperating Income (Expense)
Interest expense
Interest Income (Expense), Nonoperating, Net
Total other income/(expense)
Nonoperating Income (Expense)
Income tax (benefit)/expense
Income Tax Expense (Benefit)
Net income/(loss) from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
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)
Granted (in shares)
Vested (in shares)
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
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, Ending balance
Basis of Presentation and Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies [Text Block]
Number of Stock Units
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
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 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
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Accounts receivable, net
Accounts Receivable, Net, Current
Receivable from sale of HSOR business
Nontrade Receivables, Current
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Long-term contract assets
Contract with Customer, Asset, Net, Noncurrent
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]
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
Accrued Liabilities, Current
Contract liabilities
Contract with Customer, Liability, 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
Preferred stock, par value $0.001, 1,321,514 shares authorized, issued and outstanding at June 30, 2018 and December 31, 2017
Preferred Stock, Value, Issued
Common stock, par value $0.001, 100,000,000 shares authorized, 29,025,529 and 28,354,822 shares issued, 27,772,424 and 27,283,918 shares outstanding at June 30, 2018 and December 31, 2017
Common Stock, Value, Issued
Treasury stock at cost, 1,253,105 and 1,070,904 shares at June 30, 2018 and December 31, 2017
Treasury Stock, Value
Additional paid-in capital
Additional Paid in Capital
Total stockholders’ equity
Total liabilities and stockholders’ equity
Liabilities and Equity
Contract Assets
Change In Contract With Customer, Asset [Roll Forward]
Change in Contract with Customer, Asset [Roll Forward]
Opening Balance as of January 1, 2018
Contract with Customer, Asset, Net
Transferred to receivables from contract assets recognized at the beginning of the period
Contract with Customer, Asset, Reclassified to Receivable
Increases as a result of cumulative catch-up adjustment arising from changes in the estimate of the stage of completion
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress
Balance as of June 30, 2018
Contract Liabilities
Change In Contract With Customer, Liability [Roll Forward]
Change In Contract With Customer, Liability [Roll Forward]
Opening Balance as of January 1, 2018
Revenue recognized that was included in the contract liabilities balance at the beginning of the period
Contract with Customer, Liability, Revenue Recognized
Transferred to payables from contract liabilities recognized at the beginning of the period
Contract With Customer, Liability, Reclassified To Payable
Contract With Customer, Liability, Reclassified To Payable
Increases due to cash received or adjustment of estimates, excluding amounts recognized as revenue during the period
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price
Balance as of June 30, 2018
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
Schedule of Revenues, Operating Income (Loss) and Assets for Reportable Segments
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Capital Stock and Share-Based Compensation
Stockholders' Equity Note Disclosure [Text Block]
Operating expenses
Other expenses
Disposal Group, Including Discontinued Operation, Other Expense
Loss before income taxes
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax
Allocated tax expense
Net loss from discontinued operations
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Number of reportable segments
Number of Reportable Segments
Common stock equivalents included in diluted per share data (in shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Forecast
Scenario, Forecast [Member]
Equity Components [Axis]
Equity Component [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment to decrease accumulated deficit
Cumulative Effect on Retained Earnings, Net of Tax
Revenue recognized
Remaining revenue performance obligations
Revenue, Remaining Performance Obligation, Amount
Performance obligation, percentage
Revenue, Remaining Performance Obligation, Percentage
Payables and Accruals [Abstract]
Accrued Liabilities
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Loss Contingencies [Table]
Loss Contingencies [Table]
Customer Concentration Risk
Customer Concentration Risk [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
Macom
Macom Technology Solutions, Inc. [Member]
Macom Technology Solutions, Inc. [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]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Escrow deposits related to indemnity claims
Accounts receivable
Accounts Receivable, Net
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
Schedule of Accrued Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Contingencies and Guarantees
Commitments and Contingencies Disclosure [Text Block]
Schedule of Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Schedules of Impacts of Adopting Topic 606
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
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
Silicon Valley Bank Term Loan
Less: unamortized debt issuance costs
Unamortized Debt Issuance Expense
Less: current portion
Accrued compensation
Employee-related Liabilities, Current
Income tax payable
Accrued Income Taxes, Current
Accrued professional fees
Accrued Professional Fees, Current
Deferred rent
Accrued Rent, Current
Royalties
Accrued Royalties, Current
Accrued interest
Interest Payable, Current
Accrued liabilities - other
Other Accrued Liabilities, Current
Total accrued liabilities
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
Options Outstanding, Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance (shares)
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 [Abstract]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range
Outstanding, lower limit (in dollars per share)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit
Outstanding, upper limit (in dollars per share)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit
Granted, lower limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Granted Price Range, Lower Range Limit
Share Based Compensation, Shares Authorized Under Stock Option Plans, Granted Price Range, Lower Range Limit
Granted, upper limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Granted Price Range, Upper Range Limit
Share Based Compensation, Shares Authorized Under Stock Option Plans, Granted Price Range, Upper Range Limit
Exercised, lower limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Exercised Price Range, Lower Range Limit
Share Based Compensation, Shares Authorized Under Stock Option Plans, Exercised Price Range, Lower Range Limit
Exercised, upper limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Exercised Price Range, Upper Range Limit
Share Based Compensation, Shares Authorized Under Stock Option Plans, Exercised Price Range, Upper Range Limit
Canceled, lower limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Forfeitures Price Range, Lower Range Limit
Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures Price Range, Lower Range Limit
Canceled, upper limit (in dollars per share)
Share Based Compensation, Shares Authorized Under Stock Option Plans, Forfeitures Price Range, Upper Range Limit
Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures Price Range, Upper Range Limit
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 dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, 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
Canceled (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Ending Balance (in dollars 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)
Options Exercisable, Weighted Average Exercise Price (in dollars 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
Income Statement [Abstract]
Statement [Table]
Statement [Table]
Statement [Line Items]
Statement [Line Items]
Loss from discontinued operations, net of income tax of $0
Net income/(loss)
Preferred stock dividend
Preferred Stock Dividends, Income Statement Impact
Net income/(loss) attributable to common stockholders
Net Income (Loss) Available to Common Stockholders, Basic
Net income/(loss) per share from continuing operations:
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)
Income (Loss) from Continuing Operations, Per Basic Share
Diluted (in dollars per share)
Income (Loss) from Continuing Operations, Per Diluted Share
Net loss per share from discontinued operations:
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract]
Basic (in dollars per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Diluted (in dollars per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Net income/(loss) per share attributable to common stockholders:
Earnings Per Share [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Weighted average common shares and common equivalent shares outstanding:
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Deferred revenue
Deferred Revenue
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Inventory
Inventory Disclosure [Text Block]
Components of Inventory
Schedule of Inventory, Current [Table Text Block]
Subsequent Event - Sale of Luna Optoelectronics
Subsequent Events [Text Block]
Total operating income (loss)
Nature of Operations
Nature Of Operations [Policy Text Block]
Nature Of Operations
Unaudited Interim Financial Information
Basis of Accounting, Policy [Policy Text Block]
Reclassifications
Reclassification, Policy [Policy Text Block]
Fair Value Measurements
Fair Value of Financial Instruments, Policy [Policy Text Block]
Net Income/(Loss) Per Share
Earnings Per Share, Policy [Policy Text Block]
Recently Issued Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Schedule of Significant Changes in Contract Balances
Contract with Customer, Asset and Liability [Table Text Block]