Document And Entity Information Statement [Table] Statement [Line Items] Document Type Document Quarterly Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Amendment Flag CONDENSED CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets: Current Assets Cash and cash equivalents Cash and cash equivalents Restricted Cash and Cash Equivalents, Current Restricted cash Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable - trade, net of allowance of $30 and $32, respectively Inventory, Net Inventories Total inventories Prepaid Taxes Prepaid income tax Prepaid expenses and other current assets Assets, Current Total current assets Property, plant and equipment, net of accumulated depreciation of $37,980 and $37,980, respectively Property, plant and equipment, net Total property, plant and equipment, net Land use rights, net Operating Lease, Right-of-Use Asset Operating right of use asset Finite-Lived Intangible Assets, Net Amortization expense for intangible assets Intangible assets, net Deferred income tax assets Deferred income tax assets Other assets, net Assets TOTAL ASSETS LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities Long-term Debt, Current Maturities Less current portion Current portion of notes payable and long-term debt Accounts payable Bank acceptance payable Bank acceptance payable Bank acceptance notes issued to vendors with a zero percent interest rate Operating Lease, Liability, Current Current lease liability Accrued liabilities. Accrued liabilities Total accrued liabilities Liabilities, Current Total current liabilities Notes payable and long-term debt, less current portion Notes payable and long-term debt, less current portion Non-current portion Convertible Notes Payable, Noncurrent Convertible senior notes Net carrying amount Operating Lease, Liability, Noncurrent Non-current lease liability Liabilities TOTAL LIABILITIES Stockholders' equity: Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at December 31, 2016 or 2015 respectively Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively Common Stock; 45,000 shares authorized at $0.001 par value; 16,839 and 16,839 shares issued and outstanding at December 31, 2016 and 2015 respectively Common Stock; 45,000 shares authorized at $0.001 par value; 20,061 and 19,810 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net of Tax Accumulated other comprehensive income Retained Earnings Accumulated Deficit Retained earnings Stockholders' Equity Attributable to Parent Ending balance, value Beginning balance, value TOTAL STOCKHOLDERS' EQUITY Liabilities and Equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Allowance for Doubtful Accounts Receivable Allowance for doubtful accounts Preferred Stock par value Preferred Stock shares authorized Preferred Stock shares issued Preferred Stock shares outstanding Common stock par value Common stock shares authorized Common stock shares issued Common stock shares outstanding CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Revenue from Contract with Customer, Excluding Assessed Tax Revenue, net Revenues Cost of Goods and Services Sold Cost of goods sold Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses Research and development Research and development Sales and marketing General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Income (loss) from operations Other Income and Expense. Other income (expense) Investment Income, Interest Interest income Interest Expense Interest expense Amount of income (expense) related to other nonoperating activities classified as other in the other income (expense) classification. Other Nonoperating Income Expense Other Total other income, net Other income, net Other income (expense), net Total other income (expense), net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before income taxes Income tax benefit Income tax benefit Net income Net income (loss) Net income (loss) Net income (loss) Earnings Per Share Basic Basic Diluted Diluted n/a Weighted Average Shares Used To Compute Net Income Per Share [Abstract] Weighted average shares used to compute net income (loss) per share: Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Diluted Diluted Diluted CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Loss on foreign currency translation adjustment Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS? EQUITY Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common stock Additional Paid In Capital [Member] Additional paid-in capital Accumulated Other Comprehensive Income [Member] Accumulated other comprehensive gain (loss) Retained Earnings [Member] Retained earnings Shares, Outstanding Ending balance, shares Beginning balance, shares Stock options exercised, value Stock options exercised, net of shares withheld for employee tax, value Stock options exercised, net of shares withheld for employee tax Exercised Stock options exercised, net of shares withheld for employee tax, in shares Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock, net of shares withheld for employee tax, value Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock, net of shares withheld for employee tax, in shares Stock based compensation Share-based compensation (Loss) gain on foreign currency translation adjustment, net of tax Foreign currency translation adjustment CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Operating activities: Net income before taxes Net income (loss) Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Lower of cost or market reserve adjustment to inventory Lower of cost or market reserve adjustment for inventory Depreciation and amortization Depreciation and amortization Amortization of Debt Issuance Costs Amortization of debt issuance costs Increase in deferred tax asset Deferred income taxes, net Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss (gain) on disposal of assets Share-based compensation expense Total share-based compensation expense Share-based compensation Unrealized foreign exchange (gain) loss Unrealized foreign exchange gain Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, trade Increase (Decrease) in Accounts and Other Receivables Notes receivable Increase (Decrease) in Prepaid Taxes Prepaid income tax Increase (Decrease) in Inventories Inventories Increase (Decrease) in Other Current Assets Other current assets Represents the increase (decrease) in right of use asset. Increase (Decrease) In Right of Use Asset Operating right of use asset Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Represents the increase (decrease) in lease liability. Increase (Decrease) In Lease Liability Lease liability Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Investing activities: Payments to Acquire Short-term Investments Purchase of short-term investments Maturities of short-term investments Maturities of short-term investments Payments to Acquire Property, Plant, and Equipment Purchase of property, plant and equipment The cash outflow for acquisition of land use right. Payments To Acquire Land Use Rights Purchase of land use rights Proceeds from disposal of equipment Increase (Decrease) in Deposits Outstanding Deposits and prepaid for equipment Payments to Acquire Intangible Assets Purchase of intangible assets Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Financing activities: Proceeds from issuance of notes payable and long-term debt Proceeds from issuance of notes payable and long-term debt, net of debt issuance costs Repayments of Debt Principal payments of long-term debt and notes payable Proceeds from line of credit borrowings Proceeds from line of credit borrowings Repayments of Lines of Credit Repayments of line of credit borrowings Repayments of outstanding balance Proceeds from bank acceptance payable Proceeds from bank acceptance payable Repayments of Bank Debt Repayments of bank acceptance payable Proceeds from Convertible Debt Proceeds from issuance of convertible senior notes, net of debt issuance costs Proceeds from sale of notes after deducting the Initial Purchaser's discounts and offering expenses Exercise of stock options Exercise of stock options Payments Related to Tax Withholding for Share-based Compensation Payments of tax withholding on behalf of employees related to share-based compensation Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Effect of exchange rate changes on cash Effect of exchange rate changes on cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Total cash, cash equivalents and restricted cash shown in the statement of cash flows Supplemental disclosure of cash flow information: Cash paid for received from Cash Paid For Received From Cash paid for: Interest, net of capitalized amounts Interest Income Taxes Paid Net Income taxes Non-cash investing and financing activities: The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services related to property and equipment additions received that are used in an entity's business. Increase Decrease In Accounts Payable Related To Property And Equipment Additions Net change in accounts payable related to property and equipment additions The increase (decrease) during the reporting period in the aggregate amount of deposits and prepaid for equipment additions received that are used in an entity's business. Increase Decrease In Deposits And Prepaid For Equipment Related To Property And Equipment Additions Net change in deposits and prepaid for equipment related to property and equipment additions Description of Business. Business Description and Basis of Presentation [Text Block] Description of Business. Significant Accounting Policies Significant Accounting Policies. Significant Accounting Policies Revenue Recognition Revenue from Contract with Customer [Text Block] Revenue Recognition Operating Leases Lessee, Operating Leases [Text Block] Operating Leases Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents Disclosure Cash, Cash Equivalents and Restricted Cash Earnings Per Share [Text Block] Earnings Per Share Inventories Inventory Disclosure [Text Block] Inventories Property, Plant & Equipment Property, Plant and Equipment Property, Plant & Equipment Intangible Assets, net Intangible Assets Intangible Assets, net Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Fair Value of Financial Instruments Notes Payable and Long-Term Debt Debt Disclosure [Text Block] Notes Payable and Long-Term Debt Convertible Senior Notes The entire disclosure on convertible notes payable. Convertible Debt [Text Block] Convertible Senior Notes Accrued Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accrued Liabilities OTHER INCOME AND EXPENSE Other Income and Expense Share-Based Compensation