Property, Plant and Equipment, Type [Axis] Laboratory Equipment Tooling Computer Equipment Furniture, Fixtures and Improvements Award Type [Axis] Selling, General and Administrative Research and Development Finite-Lived Intangible Assets by Major Class [Axis] Patents Trademarks Class of Warrant or Right [Axis] Purchase Warrants Agent Warrants Equity Components [Axis] Common Stock Additional Paid-In Capital Accumulated Deficit Purchase Warrants Product and Service [Axis] Product Sales Other Revenue Service Based Accumulated Other Comprehensive Gain Fair Value Hierarchy and NAV [Axis] Level 1 Asset Class [Axis] Money Market Funds U.S. Treasury Securities Considered Cash Equivalents U.S. Treasury Securities in Short-term Investments Deferred Revenue Arrangement Type [Axis] Virtual Reality Training Extended Product Warranties Purchased Software Other Geographical [Axis] Americas Europe, Middle East and Africa Asia Pacific Customer [Axis] Distributor 1 Customer [Axis] Revenues Distributor 3 Distributor 2 Customer [Axis] Accounts receivable Cover [Abstract] Entity Registrant Name Document Type Document Period End Date Amendment Flag Entity Central Index Key Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Filer Category Entity Emerging Growth Company Entity Ex Transition Period Entity Small Business Entity Current Reporting Status Entity Shell Company Entity Interactive Data Current Entity Incorporation, State or Country Code Entity File Number Document Fiscal Year Focus Document Fiscal Period Focus Statement of Financial Position [Abstract] ASSETS Current assets: Cash and cash equivalents Short-term investments Accounts receivable, net Inventories, net Prepaid expenses and other current assets Total current assets Property and equipment, net Operating lease right-of-use asset, net Intangible assets, net Other assets, net Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities: Accounts payable Accrued liabilities Customer deposits Deferred revenue Operating lease liability - short term Note payable to bank - short term Total current liabilities Operating lease liability - long term Business acquisition liability - long term Total long-term liabilities Total liabilities Commitments and contingencies (Note 11) Stockholders' equity: Preferred stock - 5,000,000 authorized; par value $0.0001 per share; none issued and outstanding Common stock - 150,000,000 authorized; par value $0.0001 per share; 37,711,698 and 37,554,162 shares issued and outstanding each period, respectively Additional paid-in capital Accumulated deficit Accumulated other comprehensive gain Total stockholders' equity Total liabilities and stockholders' equity Preferred stock, authorized Preferred stock, par value Preferred stock, issued Preferred stock, outstanding Common stock, authorized Common stock, par value Common stock, issued Common stock, outstanding Statement [Table] Statement [Line Items] Revenues: Total revenues Cost of revenues Gross profit Operating expenses: Selling, general and administrative Research and development Total operating expenses Loss from operations Other income (expense): Interest income Other Other income (expense) Net loss Net loss per basic common share Weighted average common shares used to compute net loss per basic common share Comprehensive loss: Net loss Net unrealized gain on short-term investments Comprehensive loss Beginning balance, shares Beginning balance, amount Sale of common stock and warrants at $6.00 per share in public offering, net of issuance costs, shares Sale of common stock and warrants at $6.00 per share in public offering, net of issuance costs, amount Sale of common stock and warrants at $6.50 per share in public offering, net of issuance costs, shares Sale of common stock and warrants at $6.50 per share in public offering, net of issuance costs, amount Common shares issued upon exercise of warrants at $3.00 per share, shares Common shares issued upon exercise of warrants at $3.00 per share, amount Common shares issued upon exercise of warrants at $5.00 per share, shares Common shares issued upon exercise of warrants at $5.00 per share, amount Common shares issued upon exercise of warrants at $6.00 per share, shares Common shares issued upon exercise of warrants at $6.00 per share, amount Common shares issued upon exercise of warrants at $6.50 per share, shares Common shares issued upon exercise of warrants at $6.50 per share, amount Common shares issued upon exercise of stock options, shares Common shares issued upon exercise of stock options, amount Common shares issued upon vesting of restricted stock units, shares Common shares issued upon vesting of restricted stock units, amount Common shares issued for services, shares Common shares issued for services, amount Share-based compensation expense Net loss for the period Ending balance, shares Ending balance, amount Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization Gain on sale of assets Warranty provision Non-cash lease expense Share-based compensation Common shares issued for services Provision for doubtful accounts Changes in assets and liabilities: Accounts receivable Inventories Prepaid expenses and other current assets Accounts payable Operating lease liability Customer deposits Accrued liabilities and other Warranty settlement Deferred revenue Net cash used in operating activities Cash Flows From Investing Activities: Purchase of short-term investments Proceeds from maturities of short-term investments Capital expenditures for property and equipment Investment in patents and trademarks Proceeds from long-term deposits Net cash used in investing activities Cash Flows From Financing Activities: Proceeds from exercise of warrants Proceeds from exercise of stock options Repayment of debt Net cash provided by financing activities Net decrease in cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Organization, Consolidation and Presentation of Financial Statements [Abstract] ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Revenues [Abstract] REVENUE AND PRODUCT COSTS Financial Instruments, Owned, at Fair Value [Abstract] FAIR VALUE MEASUREMENTS Inventory Disclosure [Abstract] INVENTORIES, NET Property, Plant and Equipment [Abstract] PROPERTY AND EQUIPMENT, NET Goodwill and Intangible Assets Disclosure [Abstract] INTANGIBLE ASSETS, NET Payables and Accruals [Abstract] ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Leases [Abstract] LEASES Other Liabilities [Abstract] OTHER LIABILITIES Stockholders' Equity Attributable to Parent [Abstract] STOCKHOLDERS' EQUITY Share-based Payment Arrangement [Abstract] SHARE-BASED COMPENSATION Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Related Party Transactions [Abstract] RELATED PARTY TRANSACTIONS Revenue from Contract with Customer [Abstract] MAJOR CUSTOMERS AND RELATED INFORMATION Subsequent Events [Abstract] SUBSEQUENT EVENTS Organization and Business Description Basis of Presentation Principles of Consolidation Use of Estimates Loss per share Recent Issued Accounting Guidance Financial instruments Inventories Property and equipment Intangible assets Future amortization expense Accrued liabilities Operating lease liabilities Future lease payments Warrant activity Stock purchase warrants Stock option activity Assumptions used to to determine the fair value of the options granted Service-based RSU activity Stock-based compensation Revenues by geographic region Stock options, restricted stock units and warrants exercisable or issuable Adjusted cost Unrealized gains Unrealized losses Market value Unrealized gains/losses on short-term investments Finished goods Work in process Raw materials Inventory, net Long-Lived Tangible Asset [Axis] Property and equipment, gross Accumulated depreciation Depreciation expense Intangible assets, gross Accumulated amortization Total amortizable Indefinite life assets (non-amortizable) 2021 (9 months) 2022 2023 2024 2025 Thereafter Total estimated amortization expense Amortization expense Patent and legal costs Accrued compensation Warranty costs Consulting costs Taxes and other Accrued liabilities Total operating lease liability Remainder of 2021 (nine months) 2022 Total future minimum lease payments Less imputed interest Total Amortization of ROU operating lease assets Operating lease expense Weighted average remaining lease term Weighted average discount rate Warrants outstanding, beginning Issued Exercised Warrants outstanding, ending Average purchase price per share outstanding, beginning Issued Exercised Average purchase price per share outstanding, ending Number of common shares Exercise price per share Expiration Date Number of options outstanding, beginning Granted Exercised Forfeited/cancelled/expired Number of options outstanding, ending Number of options vested and exercisable Weighted average exercise price outstanding, beginning Granted Exercised Forfeited/cancelled/expired Weighted average exercise price outstanding, ending Weighted average exercise price vested and exercisable Weighted average remaining contractual term outstanding, beginning Weighted average remaining contractual term outstanding, ending Weighted average remaining contractual term vested and exercisable Aggregate intrinsic value outstanding Aggregate intrinsic value vested and exercisable Expected stock price volatility Risk-free interest rate Forfeiture rate Expected dividend yield Expected life of options - years Weighted-average fair value of options granted Performance Based Unvested service-based RSUs outstanding, beginning Granted Vested Forfeited and cancelled Unvested service-based RSUs outstanding, ending Grant date fair value, beginning Granted Vested Forfeited and cancelled Grant date fair value, ending Vesting period Stock-based compensation Estimated compensation cost of stock options and RSUs granted but not yet vested Estimated compensation cost of stock options and RSUs granted but not yet vested, recognition period Royalties Purchase commitment Payment to related party during period Revenue by geographic region Income Statement Location [Axis] Balance Sheet Location [Axis] Concentration risk Custom Element. PurchaseWarrants2Member Assets, Current Assets Liabilities, Current Liabilities, Noncurrent Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Gross Profit Operating Expenses Operating Income (Loss) Other Income Other Nonoperating Income (Expense) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Shares, Outstanding Increase (Decrease) in Accounts Receivable Increase (Decrease) in Inventories Increase (Decrease) in Prepaid Expense Increase (Decrease) in Accounts Payable Increase (Decrease) in Deposits Increase (Decrease) in Deferred Revenue Net Cash Provided by (Used in) Operating Activities Payments to Acquire Investments Payments to Acquire Property, Plant, and Equipment Payments to Acquire Intangible Assets Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Financing Activities Cash, Period Increase (Decrease) Schedule of Accrued Liabilities [Table Text Block] Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Finite-Lived Intangible Assets, Accumulated Amortization FiniteLivedIntangibleAssetsAmortizationExpense Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments Due Lessee, Operating Lease, Liability, Undiscounted Excess Amount Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageGrantDateFairValue ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantsInPeriodWeightedAverageGrantDateFairValue Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number NumberOfOptionsExercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value