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Performance Shares [Member] Commitments and Contingencies (see Note 16) Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Number of continuous days of service Share-based Compensation Arrangement by Share-based Payment Award, Number of Continuous Days of Service Share-based Compensation Arrangement by Share-based Payment Award, Number of Continuous Days of Service Less allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Provision for inventory obsolescence Inventory Write-down Income taxes payable Accrued Income Taxes, Noncurrent Document Period End Date Document Period End Date OEM Solutions OEM Solutions [Member] OEM Solutions Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Entity Registrant Name Entity Registrant Name Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Treasury stock, shares Treasury Stock, Shares Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Defined Contribution Plan, Nature of Employer Match [Axis] Defined Contribution Plan, Nature of Employer Match [Axis] Defined Contribution Plan, Nature of Employer Match [Axis] Less income tax (expense) benefit OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax NASDAQ - ALL MARKETS [Member] NASDAQ - ALL MARKETS [Member] Income taxes Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Weighted Average Remaining Contractual Term Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Payments for restructuring Payments for Restructuring Common Stock Common Stock [Member] Interest income Investment Income, Interest International Income (Loss) from Continuing Operations before Income Taxes, Foreign Operating income Operating income (loss) Operating Income (Loss) Current portion of operating lease liabilities Operating Lease, Liability, Current SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] $7.40 - $18.20 Exercise Price Range Eight [Member] Exercise Price Range Eight [Member] Customer With Contract, Length Of Contract Customer With Contract, Length Of Contract Customer With Contract, Length Of Contract Stock-based compensation Share-based Payment Arrangement, Noncash Expense RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Cash and cash equivalents Cash and cash 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Assumptions, Risk Free Interest Rate, Minimum Measurement Frequency [Domain] Measurement Frequency [Domain] Interest expense Interest Expense License Agreements Licensing Agreements [Member] Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Total assets acquired and liabilities assumed Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Depreciation expense Capitalized Contract Cost, Amortization City Area Code City Area Code Retained earnings Retained Earnings (Accumulated Deficit) Entity Public Float Entity Public Float Document and Entity Information [Abstract] Document and Entity Information [Abstract] Litigation Case Litigation Case [Domain] Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Employee stock purchase issuances (in shares) Common shares issued to employees Stock Issued During Period, Shares, Employee Stock Purchase Plans Line of Credit Facility, Fair Value of Amount Outstanding Line of Credit Facility, Fair Value of Amount Outstanding Order backlog Order or Production Backlog [Member] Amendment Flag Amendment Flag Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Other non-current assets Noncurrent deferred tax assets Other Noncurrent Assets [Member] Proceeds from stock option plan transactions Proceeds from Stock Options Exercised Proceeds from Stock Options Exercised Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Proceeds from long-term debt Proceeds from Issuance of Long-term Debt Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Sales and Marketing Selling and Marketing Expense [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Cost of Sales and General and Administrative Expense [Member] Cost of Sales and General and Administrative Expense [Member] Cost of Sales and General and Administrative Expense [Member] Inventories Total Inventories Inventory, Net Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Entity File Number Entity File Number U.S. Deferred Federal Income Tax Expense (Benefit) 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] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Product and Service [Axis] Product and Service [Axis] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Preferred stock, par or stated value per share Preferred Stock, Par or Stated Value Per Share Short-term lease cost Short-term Lease, Cost Issuance of stock under stock award plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Reserve for future credit returns and pricing adjustments Reserve for Future Returns and Pricing Adjustments [Member] Reserve for Future Returns and Pricing Adjustments [Member] Sales and marketing Selling and Marketing Expense Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax The Purchase Plan The Purchase Plan [Member] The Purchase Plan Statement [Line Items] Statement [Line Items] 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Share-based Payment Award, Purchase Price of Common Stock, Percent Total other (expense) income, net Other Income Net Total other income, net Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Valuation allowance Valuation allowance Deferred Tax Assets, Valuation Allowance $13.93 - $17.94 Exercise Price Range Six [Member] Exercise Price Range Six [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] EMPLOYEE BENEFIT PLANS Retirement Benefits [Text Block] Options Outstanding, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Entity Shell Company Entity Shell Company Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Asset Class [Axis] Asset Class [Axis] Local Phone Number Local Phone Number Forecast Forecast [Member] Lease liability Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent Proceeds from issuances of stock, net of offering expenses Proceeds from Issuance of Common Stock Proceeds from Issuance of Common Stock Total assets Total Assets Assets Plan Name [Domain] Plan Name [Domain] Director Director [Member] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Geographical [Domain] Geographical [Domain] Performance obligation time period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of Debt [Table Text Block] Schedule of Debt [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Furniture and fixtures, purchases software and other equipment Furniture and Fixtures Furniture and Fixtures [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Entity Tax Identification Number Entity Tax Identification Number Subsequent Event [Line Items] Subsequent Event [Line Items] Net income per common share: Earnings Per Share, Basic [Abstract] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Basic (shares) Denominator for basic net income per common share — weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Diluted Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Loss Contingency, Damages Paid, Value Loss Contingency, Damages Paid, Value Income taxes paid, net Income Taxes Paid, Net International, primarily Europe Non-US [Member] Payments to Acquire Property, Plant and Equipment by Segment Payments to Acquire Property, Plant and Equipment by Segment [Table Text Block] Payments to Acquire Property, Plant and Equipment by Segment [Table Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Lease, Cost [Abstract] Schedule of Amortization Expense Finite-lived Intangible Assets Amortization Expense [Table Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Employee Termination Costs Employee Severance [Member] Unearned revenue, beginning of period Unearned revenue, end of period Contract with Customer, Liability Executives and Employees Executives and Employees [Member] Executives and Employees [Member] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Deferred tax liabilities Non-current deferred tax liability Deferred Income Tax Liabilities, Net Noncurrent income taxes payable Other Noncurrent Liabilities [Member] Deferred Tax Assets, Other Tax Carryforwards Deferred Tax Assets, Other Tax Carryforwards Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Accounts payable Accounts Payable, Current Depreciation and amortization Depreciation, Depletion and Amortization Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Measurement Input, Control Premium [Member] Measurement Input, Control Premium [Member] Fair Value of Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Stock-based compensation after income taxes Share-based Payment Arrangement, Expense, after Tax Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Inventories Increase (Decrease) in Inventories Full Employer Match Full Employer Match [Member] Full Employer Match [Member] Total cost of sales Cost of 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Use Asset Obtained In Exchange for Lease Liability [Abstract] Right Of Use Asset Obtained In Exchange for Lease Liability [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Total long-term debt, net of current portion Long-term Debt, Excluding Current Maturities Schedule of Goodwill [Table] Schedule of Goodwill [Table] Stock-based compensation before income taxes Share-based Payment Arrangement, Expense Contingent consideration Business Combination, Consideration Transferred, Liabilities Incurred Weighted Average Remaining Contractual Term, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Amortization Cost, Amortization DimOnOff Inc. DimOnOff Inc. [Member] DimOnOff Inc. [Member] Schedule of Components of Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Common stock, par or stated value per share Common Stock, Par or Stated Value Per Share Risk free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Current assets: Assets, Current [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Gross carrying amount Finite-Lived Intangible Assets, Gross Entity Central Index Key Entity Central Index Key Schedule of Amortizable Identifiable Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Security Exchange Name Security Exchange Name Change in net unrealized gain (loss) on investments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Options Outstanding, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise Price Range [Domain] Exercise Price Range [Domain] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Current Fiscal Year End Date Current Fiscal Year End Date Opengear Opengear [Member] Opengear [Member] Stockholders' Equity Note Disclosure Stockholders' Equity Note Disclosure [Text Block] Uncollectible accounts charged to allowance, net of recoveries Accounts Receivable, Allowance for Credit Loss, Writeoff Decreases related to expiration of statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Measurement Basis [Axis] Measurement Basis [Axis] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Other (expense) income, net: Nonoperating Income (Expense) [Abstract] Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Changes in operating assets and liabilities (net of acquisitions): Increase (Decrease) in Operating Capital [Abstract] Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Cash paid at closing Cash Payments to Acquire Businesses, Gross Defined Contribution Plan [Table] Defined Contribution Plan [Table] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity 2020 Restructuring 2020 Restructuring [Member] 2020 Restructuring Foreign currency translation adjustment Goodwill, Foreign Currency Translation Gain (Loss) Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Net property, equipment and improvements Long-Lived Assets Proceeds from employee stock purchase plan transactions Proceeds from Stock Plans Schedule of Selected Balance Sheet Data Selected Balance Sheet Data [Table Text Block] Selected Balance Sheet Data [Table Text Block] Statutory income tax amount Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount 2019 2019 [Member] 2019 Options Outstanding Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Balance at beginning of period Balance at end of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Cost of Sales Cost of Sales [Member] U.S. capital loss carryforward Deferred Tax Assets, Capital Loss Carryforwards Inventories Inventory, Policy [Policy Text Block] Foreign Current Foreign Tax Expense (Benefit) Purchased and Core Technology Developed Technology Rights [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Adjustment of tax contingency reserves Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Billings Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination