Stockholders' Equity Note [Abstract] ACCUMULATED OTHER COMPREHENSIVE INCOME Disclosure of Reclassification Amount [Text Block] Revenue from Contract with Customer [Abstract] REVENUES Revenue from Contract with Customer [Text Block] Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Subsequent Events [Abstract] Schedule of Repurchase Agreement Counterparty [Table] Schedule of Repurchase Agreement Counterparty [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] May Repurchase Program May Repurchase Program [Member] May Repurchase Program [Member] November Repurchase Program November Repurchase Program [Member] November Repurchase Program [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Forecast Scenario, Forecast [Member] Repurchase Agreement Counterparty [Line Items] Repurchase Agreement Counterparty [Line Items] Repurchase of common stock Stock Repurchase Program, Authorized Amount Stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Common stock repurchased, average price per share (in usd per share) Treasury Stock Acquired, Average Cost Per Share Value of total number of shares purchased Stock Repurchased and Retired During Period, Value Remaining authorization at the end of the period Stock Repurchase Program, Remaining Authorized Repurchase Amount Dividends declared per share (in usd per share) Common Stock, Dividends, Per Share, Declared Balance Sheet Related Disclosures [Abstract] BALANCE SHEET COMPONENTS Supplemental Balance Sheet Disclosures [Text Block] Product Warranties Disclosures [Abstract] ACCRUED WARRANTY Product Warranty Disclosure [Text Block] Segment Reporting [Abstract] Revenues by product Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Revenues by geography Revenue from External Customers by Geographic Areas [Table Text Block] Percentage of revenue and accounts receivable Schedule Of Revenue And Accounts Receivable By Major Customers By Reporting Segments Table [Table Text Block] Schedule of revenue and accounts receivable by major customers by reporting segments. Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving credit facility Revolving Credit Facility [Member] Term loan facility Term Loan [Member] Term Loan [Member] Letters of credit Letter of Credit [Member] Sublimit for swingline loan advances Swingline Loan [Member] Swingline Loan [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Amended Credit Agreement Amended Credit Agreement [Member] Amended Credit Agreement [Member] Second Amended & Restated Credit Agreement Second Amended & Restated Credit Agreement [Member] Second Amended & Restated Credit Agreement [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Base rate Base Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Federal funds rate Federal Funds Effective Swap Rate [Member] Applicable interest rate Applicable Interest Rate [Member] Applicable Interest Rate [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Credit facility Line of Credit Facility, Maximum Borrowing Capacity Additional borrowing capacity Line of Credit Facility, Option, Additional Maximum Borrowing Capacity Line of Credit Facility, Option, Additional Maximum Borrowing Capacity Repayment of outstanding balance Repayments of Long-term Lines of Credit Debt issuance cost Debt Issuance Costs, Line of Credit Arrangements, Gross Percentage of principal due quarterly Line of Credit Facility, Periodic Payment, Principal, Percentage Line of Credit Facility, Periodic Payment, Principal, Percentage Debt basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Debt basis spread over applicable interest rate Debt Instrument, Debt Default, Basis Spread Over Applicable Interest Rate Debt Instrument, Debt Default, Basis Spread Over Applicable Interest Rate Commitment fee percentage of unused borrowings Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Issuance fees per annum Line of Credit Facility, Debt Issuance Costs, Percentage, Annually Line of Credit Facility, Debt Issuance Costs, Percentage, Annually Maximum leverage ratio Ratio of Indebtedness to Net Capital Minimum liquidity to satisfy covenant terms Line of Credit Facility, Covenant Terms, Minimum Liquidity Line of Credit Facility, Covenant Terms, Minimum Liquidity Availability of revolving credit facility to satisfy covenant term Line of Credit Facility, Covenant Terms, Minimum Available Borrowings to Satisfy Covenant Line of Credit Facility, Covenant Terms, Minimum Available Borrowings to Satisfy Covenant Principal payment Repayment of Long-Term Lines of Credit, Principal Repayment of Long-Term Lines of Credit, Principal Interest payment Repayment of Long-Term Lines of Credit, Interest Repayment of Long-Term Lines of Credit, Interest Outstanding borrowing Long-term Line of Credit Interest rate percentage on term loan Line of Credit Facility, Interest Rate During Period Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Service Provider Technology Service Provider Technology [Member] Service Provider Technology [Member] Enterprise Technology Enterprise Technology [Member] Enterprise Technology [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenues Sales Revenue, Net [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Revenue percentage Concentration Risk, Percentage Schedule of debt Schedule of Debt [Table Text Block] Finished goods Inventory, Finished Goods, Net of Reserves Raw materials Inventory, Raw Materials, Net of Reserves Total Inventory, Net SUBSEQUENT EVENTS Subsequent Events [Text Block] Debt payment obligations Long-term Debt, Fiscal Year Maturity [Abstract] Debt payment obligations, 2019 (remainder) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Debt payment obligations, 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two Debt payment obligations, 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three Debt payment obligations, 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four Debt payment obligations, 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five Debt payment obligations, thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Debt payment obligations, total Long-term Debt Interest and other payments on debt payment obligations (1) Interest and Other Payments on Debt Obligations [Abstract] Interest and Other Payments on Debt Obligations [Abstract] Interest and other payments on debt payment obligations, 2019 (remainder) Long Term Debt Maturities Repayments Of Interest And Other Payments Remainder Of Fiscal Year Long Term Debt Maturities Repayments Of Interest And Other Payments Remainder Of Fiscal Year Interest and other payments on debt payment obligations, 2020 Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Two Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Two Interest and other payments on debt payment obligations, 2021 Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Three Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Three Interest and other payments on debt payment obligations, 2022 Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Four Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Four Interest and other payments on debt payment obligations, 2023 Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Five Long Term Debt Maturities Repayments Of Interest And Other Payments In Year Five Interest and other payments on debt payment obligations, thereafter Long Term Debt Maturities Repayments Of Interest And Other Payments After Year Five Long Term Debt Maturities Repayments Of Interest And Other Payments After Year Five Interest and other payments on debt payment obligations, total Long Term Debt Maturities Repayments Of Interest And Other Payments Long Term Debt Maturities Repayments Of Interest And Other Payments Total Total Debt [Abstract] Total Debt [Abstract] Debt and interest payment obligations, 2018 (remainder) Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments Remainder Of Fiscal Year Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments Remainder Of Fiscal Year Debt and interest payment obligations, 2019 Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Two Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Two Debt and interest payment obligations, 2020 Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Three Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Three Debt and interest payment obligations, 2021 Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Four Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Four Debt and interest payment obligations, 2022 Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Five Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments In Year Five Debt and interest payment obligations, thereafter Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments After Year Five Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments After Year Five Debt and interest payment obligations, total Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments Long Term Debt Maturities Repayments Of Principal And Interest And Other Payments Debt — short-term Short-term Debt Debt issuance costs, net Debt Issuance Costs, Current, Net Debt — long-term Long-term Debt, Excluding Current Maturities Debt issuance costs, net Debt Issuance Costs, Noncurrent, Net Statement of Financial Position [Abstract] Allowance for doubtful accounts receivable Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Earnings Per Share [Abstract] EARNINGS PER SHARE Earnings Per Share [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeitures and cancellations (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Ending balance (in shares) Number of shares, vested, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Number of shares, vested and exercisable, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 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 Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeitures and cancellations (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) Options, weighted average exercise price, vested, ending balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options, weighted average exercise price, vested and exercisable, ending balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Options outstanding, weighted average remaining contractual term, ending balance (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options, remaining contractual term, vested, ending balance (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options, weighted average remaining contractual term, vested and exercisable, ending balance (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Options outstanding, aggregate intrinsic value, ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options, aggregate intrinsic value, vested, ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options, aggregate intrinsic value, vested and exercisable, ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Focus 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 Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Disclosures [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Fair value of marketable securities, continuous unrealized losses, less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Fair value of marketable securities, continuous unrealized losses, 12 months or greater Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Fair value of marketable securities, continuous unrealized losses Debt Securities, Available-for-sale, Unrealized Loss Position Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Unrealized loss, continuous unrealized losses, less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized loss, continuous unrealized losses, 12 months or greater Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized loss, continuous unrealized losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 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] Chief Executive Officer Chief Executive Officer [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Sales, general and administrative Selling, General and Administrative Expenses [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Aircraft lease agreement Lease Agreements [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Rate to lease aircraft Aircraft Leasing Hourly Rate Aircraft Leasing Hourly Rate Aircraft leasing expenses Aircraft Rental DEBT Debt Disclosure [Text Block] 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] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost of revenues Cost of Sales [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 expense Allocated Share-based Compensation Expense Income Tax Disclosure [Abstract] Provisions for income taxes Income Tax Expense (Benefit) Unrecognized tax benefits Unrecognized Tax Benefits Net increase (decrease) in unrecognized tax benefits Unrecognized Tax Benefits, Period Increase (Decrease) Interest accrued related to uncertain tax matters Unrecognized Tax Benefits, Interest on Income Taxes Accrued Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] IIRS Internal Revenue Service (IRS) [Member] Nature of Uncertainty [Axis] Nature of Uncertainty [Axis] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Settlement With Taxing Authority of Statute Lapses Settlement With Taxing Authority of Statute Lapses [Member] Settlement With Taxing Authority of Statute Lapses [Member] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Unrecognized tax benefits, decrease is reasonably possible Decrease in Unrecognized Tax Benefits is Reasonably Possible Loss Contingency, Estimate of Possible Loss Loss Contingency, Estimate of Possible Loss Schedule of 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] Testing equipment Testing Equipment [Member] Testing Equipment [Member] Computer and other equipment Computer And Other Equipment [Member] Computer And Other Equipment [Member] Tooling equipment Tooling Equipment [Member] Tooling Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Software Computer Software, Intangible Asset [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and Equipment, Gross Property, Plant and Equipment, Gross Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and Equipment, Net Property, Plant and Equipment, Net INCOME TAXES Income Tax Disclosure [Text Block] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Accounts Receivable Accounts Receivable [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Customer A Customer A [Member] Customer A [Member] Customer B Customer B [Member] Customer B [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Concentration percentage Organization, Consolidation and Presentation of Financial Statements [Abstract] BUSINESS AND BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] Financial instruments' amortized cost, gross unrealized gains and losses, and fair value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Marketable securities in continuous unrealized loss position Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Amortized costs and fair value of investment securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Equity [Abstract] Class of Treasury Stock [Table] Class of Treasury Stock [Table] March Repurchase Program March Repurchase Program [Member] March Repurchase Program [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Number of shares repurchased and retired (in shares) Stock repurchase cost incurred but not yet paid Stock Repurchase Cost Incurred But Not Yet Paid Stock Repurchase Cost Incurred But Not Yet Paid Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair value, inputs, level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Debt Debt Instrument, Fair Value Disclosure Warranty obligations Schedule of Product Warranty Liability [Table Text Block] 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 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] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested RSUs, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number RSUs granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period RSUs canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested RSUs, ending balance (in shares) Weighted Average Grant Date Fair Value Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Non-vested RSUs, weighted average grant date fair value, 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 RSUs granted, weighted average grant date fair value (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 RSUs vested, weighted average grant date fair value (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 RSUs canceled, weighted average grant date fair value (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 Non-vested RSUs, weighted average grant date fair value, ending balance (in usd per share) RELATED PARTY TRANSACTIONS AND CERTAIN OTHER TRANSACTIONS Related Party Transactions Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] FrontRow FrontRow [Member] FrontRow [Member] Inventory [Axis] Inventory [Axis] Inventory [Domain] Inventory [Domain] Finished goods Finished Goods [Member] Finished Goods [Member] Raw materials Raw Materials [Member] Components Components [Member] Components [Member] Property Subject to or Available for Operating Lease [Line Items] Property Subject to or Available for Operating Lease [Line Items] Inventory purchase obligation Purchase Obligation Other obligations Other Commitment SEGMENT INFORMATION, REVENUES BY GEOGRAPHY AND SIGNIFICANT CUSTOMERS Segment Reporting Disclosure [Text Block] Number of operating segments Number of Operating Segments Number of reportable segments Number of Reportable Segments Number of primary categories Number of Subsegments Number of Subsegments Income Statement [Abstract] Revenues Cost of revenues Cost of Goods and Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense Sales, general and administrative Selling, General and Administrative Expense Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Interest expense and other, net Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net income Net Income (Loss) Attributable to Parent Net income per share of common stock: Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Weighted average shares used in computing net income per share of common stock: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized (loss) on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Award Type [Domain] Stock options Employee Stock Option [Member] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net income Denominator: Weighted-average shares used in computing basic net income per share (in shares) Add—dilutive potential common shares: Dilutive Potential Common Shares [Abstract] Dilutive potential common shares. Dilutive potential common shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average shares used in computing diluted net income per share (in shares) Net income per share of common stock: Earnings Per Share, Basic and Diluted [Abstract] Deferred Revenue — long-term Contract with Customer, Liability, Noncurrent Other long-term liabilities Other Sundry Liabilities, Noncurrent Total Other Liabilities, Noncurrent Accrued expenses Accrued Liabilities, Current Accrued compensation and benefits Accrued Employee Benefits, Current Warranty accrual Standard Product Warranty Accrual Deferred revenue — short-term Contract with Customer, Liability, Current Customer deposits Customer Deposits, Current Reserve for sales returns Reserve for Sales Returns, Current Reserve for Sales Returns, Current Other payables Accounts Payable, Other, Current Total Other Liabilities, Current Authorized shares, stock incentive plans (in shares) Common Stock, Capital Shares Reserved for Future Issuance Aggregate intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Unrecognized compensation costs Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Intrinsic value of RSUs vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Option Vested In Period Intrinsic Value Share based compensation arrangement by share based payment award equity instruments other than option vested in period intrinsic value. Intrinsic value of RSUs outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Weighted-average period recognized (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Operating leases, 2019 (remainder) Operating Leases, Future Minimum Payments, Remainder of Fiscal Year Operating leases, 2020 Operating Leases, Future Minimum Payments, Due in Two Years Operating leases, 2021 Operating Leases, Future Minimum Payments, Due in Three Years Operating leases, 2022 Operating Leases, Future Minimum Payments, Due in Four Years Operating leases, 2023 Operating Leases, Future Minimum Payments, Due in Five Years Operating leases, thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating leases, total Operating Leases, Future Minimum Payments Due STOCK BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] New Accounting Updates Recently Adopted and Recent Accounting Standards or Updates Not Yet Effective New Accounting Pronouncements, Policy [Policy Text Block] Revenues Revenue from Contract with Customer [Policy Text Block] 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] Potential shares of common stock excluded from the EPS calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Inventories Schedule of Inventory, Current [Table Text Block] Property and equipment, net Property, Plant and Equipment [Table Text Block] Other Long-term Assets Schedule of Other Assets, Noncurrent [Table Text Block] Other Current Liabilities Other Current Liabilities [Table Text Block] Other Long Term Liabilities Other Noncurrent Liabilities [Table Text Block] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Intangible assets, net (1) Intangible Assets, Net (Excluding Goodwill) Other long-term assets Other Assets, Miscellaneous, Noncurrent Total Other Assets, Noncurrent Accumulated amortization, intangible assets Finite-Lived Intangible Assets, Accumulated Amortization Warranty period (in years) Standard Product Warranty Period Standard product warranty period. Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Cash Flows from Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of debt issuance costs Amortization of Debt Issuance Costs Premium amortization and (discount accretion), net Amortization of Debt Discount (Premium) Provision for inventory obsolescence Inventory Write-down Provision/(recovery) for loss on vendor deposits Provision for Gain (Loss) on Vendor Deposit Provision for Gain (Loss) on Vendor Deposit Stock-based compensation Share-based Compensation Other, net Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Vendor deposits Increase (Decrease) in Vendor Deposits Increase (Decrease) in Vendor Deposits Prepaid income taxes Increase (Decrease) in Prepaid Taxes Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Income taxes payable Increase (Decrease) in Income Taxes Payable Deferred revenues Increase (Decrease) in Contract with Customer, Liability Accrued and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows from Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment and other long-term assets Payments to Acquire Property, Plant, and Equipment Purchase of investments Payments to Acquire Investments Proceeds from sale of investments Proceeds from Sale of Debt Securities, Available-for-sale Net cash (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows from Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from borrowing under the Amended Credit Facility- Revolver Proceeds from Long-term Lines of Credit Principal payment Repurchases of common stock Payments for Repurchase of Common Stock Payment of common stock cash dividends Payments of Dividends Proceeds from exercise of stock options Proceeds from Stock Options Exercised Tax withholdings related to net share settlements of restricted stock units Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase 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 Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Income taxes paid, net of refunds Income Taxes Paid, Net Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Non-Cash Investing and Financing Activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Unpaid stock repurchases Dividends, Cash Unpaid property and equipment and other long-term assets Capital Expenditures Incurred but Not yet Paid Unpaid investment purchases Liabilities Assumed Marketable Securities [Table] Marketable Securities [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair value, measurements, recurring Fair Value, Measurements, Recurring [Member] Financial Instrument [Axis] Financial Instrument [Axis] Investment [Domain] Financial Instruments [Domain] Money market funds Money Market Funds [Member] Commercial paper Commercial Paper [Member] Corporate securities Corporate Debt Securities [Member] U.S agency securities US Government Agencies Debt Securities [Member] US Government Bonds US Treasury Bond Securities [Member] Fair value, inputs, level 1 Fair Value, Inputs, Level 1 [Member] Marketable Securities [Line Items] Marketable Securities [Line Items] Debt Securities, Available-for-sale, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Debt Securities, Available-for-sale, Unrealized Gain Debt Securities, Available-for-sale, Unrealized Gain Debt Securities, Available-for-sale, Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Debt Securities, Available-for-sale Debt Securities, Available-for-sale Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Short-Term Investments Debt Securities, Available-for-sale, Current Long-Term Investments Debt Securities, Available-for-sale, Noncurrent COMMON STOCK AND TREASURY STOCK Stockholders' Equity Note Disclosure [Text Block] Stock-based compensation expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of option activity for the company's stock incentive plans Share-based Compensation, Stock Options, Activity [Table Text Block] Activity of RSUs Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Geographical Components Reportable Geographical Components [Member] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] North America North America [Member] South America South America [Member] Europe, the Middle East and Africa (EMEA) EMEA [Member] Asia Pacific Asia Pacific [Member] United States UNITED STATES Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities [Abstract] Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Available-for-sale, amortized cost, due within 1 year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Available-for-sale, amortized cost, due after 1 year through 5 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Available-for-sale, amortized cost, total Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Available-for-sale, fair value, due within 1 year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Available-for-sale, fair value, due after 1 year through 5 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Available-for-sale, fair value, total Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Investments — short-term Short-term Investments Accounts receivable, net of allowance for doubtful accounts of $394 and $453 at September 30, 2018 and June 30, 2018, respectively Accounts Receivable, Net, Current Inventories Vendor deposits Vendor Deposits, Current Vendor Deposits, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Deferred tax assets — long-term Deferred Tax Assets, Net, Noncurrent Investments — long-term Long-term Investments Other long-term assets Total assets Assets Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Income taxes payable Taxes Payable, Current Other current liabilities Total current liabilities Liabilities, Current Income taxes payable — long-term Unrecognized Tax Benefits In Long Term Income Taxes Payable Unrecognized Tax Benefits In Long Term Income Taxes Payable Other long-term liabilities Total liabilities Liabilities Commitments and contingencies (Note 9) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock—$0.001 par value; 50,000,000 shares authorized; none issued Preferred Stock, Value, Issued Common stock—$0.001 par value; 500,000,000 shares authorized: 72,857,887 and 74,072,521 outstanding at September 30, 2018 and June 30, 2018, respectively Common Stock, Value, Issued Additional paid–in capital Additional Paid in Capital Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Potential shares of common stock excluded from diluted per share calculation Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Warranty accrual, beginning balance Accruals for warranties issued during the period Standard Product Warranty Accrual, Increase for Warranties Issued Changes in liability for pre-existing warranties during the period Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Settlements made during the period Standard Product Warranty Accrual, Decrease for Payments Warranty accrual, ending balance Future minimum annual payments under operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]