Document and entity information [Abstract]. Document And Entity Information Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets Assets [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total Investments Investments Short-term Investments, Total Accounts Receivable, Net, Current Accounts receivable, net Accounts Receivable, Net, Current, Total Inventory, Net Inventories Inventory, Net, Total Prepaid Expense and Other Assets, Current Prepaid expenses and other receivables Prepaid Expense and Other Assets, Current, Total Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred income taxes Deferred Tax Assets, Net, Current, Total Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property, Plant and Equipment, Net, Total Goodwill and intangible assets, net of accumulated amortization. Goodwill and Intangible Assets, Goodwill and intangible assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Shareholders' Equity Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Employee-related Liabilities, Current Accrued compensation Employee-related Liabilities, Current, Total Accrued warranty and other accrued expenses. Accrued warranty and other Accrued warranty and other Earn-outs payable. Earn-outs payable Earn-outs payable Taxes Payable, Current Income taxes payable Taxes Payable, Current, Total Liabilities, Current Total current liabilities Deferred Tax Liabilities, Current Deferred income taxes Accrued Income Taxes, Noncurrent Income taxes payable Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock Common Stock, Value, Issued, Total Additional Paid in Capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional paid-in capital Additional Paid in Capital, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained earnings Retained Earnings (Accumulated Deficit), Total Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholder's equity Total stockholder's equity Liabilities and Equity Total liabilities and shareholders' equity Condensed Consolidated Statements Of Income Revenues [Abstract] Revenue: Sales Revenue, Goods, Net Product sales Sales Revenue, Goods, Net, Total Royalty Revenue Royalties Royalty Revenue, Total Revenues Total Revenue Cost of Revenue [Abstract] Costs of revenue (exclusive of amortization shown below): Cost of Goods Sold Product sales Cost of Goods Sold, Total Gross Profit Gross profit Gross profit Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Selling, marketing and product support Selling and Marketing Expense, Total General and Administrative Expense General and administrative General and Administrative Expense, Total Research and Development Expense Research and development Research and Development Expense, Total Business Combination, Acquisition Related Costs Acquisition related expenses Amortization of Intangible Assets Amortization of intangible assets Amortization of Intangible Assets, Total Operating Expenses Total operating expenses Operating Income (Loss) Income (loss) from operations Other Nonoperating Income (Expense) Other income (expense), net Other income (expense), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income Tax Expense (Benefit) Income tax expense (benefit) Income Tax Expense (Benefit), Total Net Income (Loss) Attributable to Parent Net (loss) income Net income (loss) Earnings Per Share [Abstract] Net income (loss) per common share: Earnings Per Share, Basic Basic Earnings Per Share, Basic, Total Earnings Per Share, Diluted Diluted Earnings Per Share, Diluted, Total Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Condensed Consolidated Statements Of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities Depreciation, Depletion and Amortization Depreciation and amortization Depreciation, Depletion and Amortization, Total Stock option expense Stock option expense Share-based Compensation, Total Change in Operating Assets and Liabilities, Net of Acquisition Change in operating assets and liabilities, net of acquisition Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities: Payments to Acquire Property, Plant, and Equipment Net purchases of property and equipment Net purchases of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Businesses, Net of Cash Acquired Cash paid to sellers of CitySync equity Cash paid to sellers of CitySync equity Payments to Acquire Businesses, Net of Cash Acquired, Total Payments for Previous Acquisition Repayment of CitySync seller loans Repayment of CitySync seller loans Payment of earn-out. Payment of Earn-Out Payment of earn-outs Payments for (Proceeds from) Investments Net sales of investments Net sales of investments Payments for (Proceeds from) Investments, Total Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing activities: Proceeds from Issuance of Common Stock Net proceeds from common stock offering Repayments of Bank Debt Repayment of bank debt Repayment of bank debt Proceeds from Stock Options Exercised Proceeds from exercise of stock options Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents, Total Cash and Cash Equivalents, Period Increase (Decrease) Decrease in cash and cash equivalents Basis Of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis Of Presentation Acquisitions Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block] Acquisitions Goodwill And Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill And Intangible Assets Warranties Product Warranty Disclosure [Text Block] Warranties Net income per common share and comprehensive income (loss) [Abstract]. Net Income (Loss) Per Common Share And Comprehensive Income Net income per common share and comprehensive income (loss) [Text Block]. Net Income Per Common Share And Comprehensive Income (Loss) [Text Block] Net Income (Loss) Per Common Share And Comprehensive Income Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Segment Information Segment Reporting Disclosure [Text Block] Segment Information Related Party Transaction Related Party Transactions Disclosure [Text Block] Related Party Transaction New And Recently Adopted Accounting Pronouncements Description of New Accounting Pronouncements Not yet Adopted [Text Block] New And Recently Adopted Accounting Pronouncements