Product and Service [Axis] Systems [Member] Disposables, Service and Accessories [Member] Contract Assets - Unbilled Receivables [Member] Product Shipped, Revenue Deferred [Member] Deferred Service and License Fees [Member] Property, Plant and Equipment, Type [Axis] Equipment [Member] Leasehold Improvements [Member] Credit Facility [Axis] Revolving Credit Facility [Member] Exercise Price Range [Axis] Range One [Member] Range Two [Member] Range Three [Member] Range Four [Member] Plan Name [Axis] 2012 Stock Incentive Plan [Member] Award Type [Axis] Restricted Stock Units [Member] Range [Axis] Minimum [Member] Maximum [Member] Range Five [Member] Equity Components [Axis] Common Stock [Member] Additional Paid-In Capital [Member] Treasury Stock [Member] Accumulated Deficit [Member] Class of Stock [Axis] Convertible Preferred Stock [Member] Customer Deposits [Member] Series A Convertible Preferred Stock [Member] Warrant [Member] Concentration Risk Benchmark [Axis] Revenue from System Delivery and Installation [Member] Disposable Revenue [Member] Royalty Revenue [Member] Other Recurring Revenue [Member] Sublease Revenue [Member] Stock Options and Stock Appreciation Rights [Member] Title of Individual [Axis] Primary Lender [Member] Variable Rate [Axis] Prime Rate [Member] Income Tax Authority [Axis] Series B Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update 2016-02 [Member] Sale of Stock [Axis] Private Placement [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Flag Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] Assets Current assets: Cash and cash equivalents Accounts receivable, net of allowance of $368,191 and $398,847 in 2019 and 2018, respectively Inventories, net Prepaid expenses and other current assets Total current assets Property and equipment, net Operating lease right-of-use assets Other assets Total assets Liabilities and stockholders' equity Current liabilities: Accounts payable Accrued liabilities Deferred revenue Current portion of operating lease liabilities Total current liabilities Long-term deferred revenue Operating lease liabilities Other liabilities Total liabilities Series A - Convertible preferred stock: Convertible preferred stock, Series A, par value $0.001; 23,780 and 23,900 shares outstanding at 2019 and 2018 Stockholders' equity: Convertible preferred stock, Series B, par value $0.001; 10,000,000 shares authorized, 5,610,121 and no shares outstanding at 2019 and 2018 Common stock, par value $0.001; 300,000,000 shares authorized, 66,677,111 and 59,058,297 shares issued at 2019 and 2018, respectively Additional paid in capital Treasury stock, 4,015 shares at 2019 and 2018 Accumulated deficit Total stockholders' equity Total liabilities and stockholders' equity Accounts receivable, allowance Series A Convertible Preferred Stock, par value Series A Convertible Preferred Stock, shares outstanding Series B Preferred Stock, par value Series B Preferred Stock, shares authorized Series B Preferred Stock, shares outstanding Common stock, par value Common stock, shares authorized Common stock, shares issued Treasury stock, shares Statement [Table] Statement [Line Items] Revenue: Sublease Total revenue Cost of revenue: Sublease Total cost of revenue Gross margin Operating expenses: Research and development Sales and marketing General and administrative Total operating expenses Operating loss Other income Interest income (expense) Net income (loss) Cumulative dividend on convertible preferred stock Loss attributable to common stockholders Net loss per share attributable to common stockholders: Basic Diluted Weighted average number of common shares and equivalents: Basic Diluted Beginning Balance Beginning Balance, Shares Issuance of common stock Issuance of common stock, shares Issuance of common stock and warrants Issuance of common stock and warrants, Shares Share-based compensation Share-based compensation, shares Components of net income (loss) Employee stock purchase plan Employee stock purchase plan, Shares Cumulative catchup for adoption of ASC 606 Preferred stock issuance Preferred stock issuance, shares Preferred stock conversion Preferred stock conversion, shares Ending Balance Ending Balance, Shares Statement of Cash Flows [Abstract] Cash flows from operating activities Net income (loss) Adjustments to reconcile net income (loss) to cash used in operating activities: Depreciation Amortization of intangibles Amortization of deferred finance costs Non-cash lease expense Share-based compensation Loss on asset disposal Adjustment of warrants Changes in operating assets and liabilities: Accounts receivable Inventories Prepaid expenses and other current assets Other assets Accounts payable Accrued liabilities Deferred revenue Operating lease liability Other liabilities Net cash used in operating activities Cash flows from investing activities Purchase of fixed assets Net cash used in investing activities Cash flows from financing activities Proceeds from issuance of stock, net of issuance costs Proceeds from warrant exercise Net cash provided by financing activities Net increase in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of Business Accounting Policies [Abstract] Summary of Significant Accounting Policies Inventory Disclosure [Abstract] Inventories Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Prepaid Expenses and Other Assets Property, Plant and Equipment [Abstract] Property and Equipment Leases [Abstract] Leases Payables and Accruals [Abstract] Accrued Liabilities Debt Disclosure [Abstract] Long-Term Debt and Credit Facilities Stockholders' Equity Note [Abstract] Convertible Preferred Stock and Stockholders' Equity Product Warranties Disclosures [Abstract] Product Warranty Provisions Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Subsequent Events [Abstract] Subsequent Events Basis of Presentation Financial Instruments Revenue and Costs of Revenue Assets Recognized from the Costs to Obtain a Contract with a Customer Share-Based Compensation Net Income (Loss) Per Common Share ("EPS") Recently Issued Accounting Pronouncements Schedule of Revenue Disaggregated by Type Summary of Contract Assets and Liabilities Computation of Basic and Diluted Earnings Per Share Schedule of Inventories Schedule of Prepaid Expenses and Other Assets Schedule of Property and Equipment Schedule of Lease Costs and Other Lease Information Schedule of Future Minimum Operating Lease Payments Schedule of Accrued Liabilities Summary of Option and Stock Appreciation Rights Activity Summary of Restricted Stock Unit Activity Schedule of Accrued Warranty Installed base Antidilutive Securities [Axis] Revenues percentage Remaining performance obligation Revenue recognized Capitalized contract acquisition costs Share-based compensation, requisite service period Potential common shares excluded from diluted earnings per share Weighted average exercise price Exercise price of warrants Total deferred revenue Less: Long-term deferred revenue Total current deferred revenue Net loss attributable to common stockholders Weighted average number of common shares and equivalents: Basic EPS Diluted EPS Raw materials Work in process Finished goods Reserve for obsolescence Total inventory Prepaid expenses Prepaid commissions Deposits Total prepaid expenses and other assets Less: Noncurrent prepaid expenses and other assets Total current prepaid expenses and other assets Gross property and equipment Less: Accumulated depreciation Net property and equipment Schedule of Operating Leased Assets [Table] Operating Leased Assets [Line Items] Lease Arrangement, Type [Axis] Weighted average discount rate for operating leases Weighted average remaining lease term for operating lease term Right of use assets Undiscounted future cash flows to be received under the sublease 2019 Undiscounted future cash flows to be received under the sublease 2020 Undiscounted future cash flows to be received under the sublease 2021 Operating lease cost Short-term lease cost Sublease income Total lease cost Cash paid within operating cash flows 2019 2020 2021 2022 and thereafter Total lease payments Less: Interest Present value of lease liabilities Accrued salaries, bonus, and benefits Accrued licenses and maintenance fees Accrued warranties Accrued taxes Accrued professional services Other Total accrued liabilities Less: Long term accrued liabilities Total current accrued liabilities Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Line of credit maturity date Line of credit facility, maximum borrowing capacity Line of credit interest rate Line of credit facility, current borrowing capacity Total liquidity Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Statistical Measurement [Axis] Number of stockholders votes Dividends declared Dividends paid Sale of stock, number of shares sold Sale of stock, price per share Preferred stock, par or stated value Conversion price per share Net proceeds received Number of preferred stock issued Preferred stock, par value Preferred stock, conversion price Common stock issuable from warrants Preferred stock dividend rate Preferred stock redemption, triggering event, percent of common stock sold threshold Warrants exercisable date Increased in stockholders' equity Increased in common shares outstanding Increase in number of shares authorized for issuance under the plan Remaining shares available for issuance Total compensation cost not yet recognized Weighted average amortization period of total compensation cost not yet recognized Number of Options/SARs, Outstanding, Beginning Balance Number of Options/SARs, Granted Number of Options/SARs, Exercised Number of Options/SARs, Forfeited Number of Options/SARs, Outstanding, Ending Balance Range of Exercise Price, Lower Limit Range of Exercise Price, Upper Limit Weighted Average Exercise Price per Share, Outstanding, Beginning Balance Weighted Average Exercise Price per Share, Granted Weighted Average Exercise Price per Share, Exercised Weighted Average Exercise Price per Share, Forfeited Weighted Average Exercise Price per Share, Outstanding, Ending Balance Number of Restricted Stock Units, Outstanding, December 31, 2018 Number of Restricted Stock Units, Granted Number of Restricted Stock Units, Vested Number of Restricted Stock Units, Forfeited Number of Restricted Stock Units, Outstanding, June 30, 2019 Weighted Average Grant Date Fair Value per Unit, Outstanding, December 31, 2018 Weighted Average Grant Date Fair Value per Unit, Granted Weighted Average Grant Date Fair Value per Unit, Vested Weighted Average Grant Date Fair Value per Unit, Forfeited Weighted Average Grant Date Fair Value per Unit, Outstanding, June 30, 2019 Standard product warranty coverage term Warranty accrual, beginning of the fiscal period Accrual adjustment for product warranty Payments made Warranty accrual, end of the fiscal period Carrying value as of the balance sheet date of obligations incurred through that date and payable for license and maintenance fees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Issuance of common stock and warrants, shares. Biosense Webster Inc [Member] Contract Assets - Unbilled Receivables [Member] Country Other Than U.S. [Member] Customer Deposits [Member] Customer [Member] Deferred Service and License Fees [Member] Demonstration And Assembly [Member] Disposable Revenue [Member] Disposables, Service and Accessories [Member] Stock Option and Stock Appreciation Rights (SARs) [Member] Employee Stock Purchase Plan (“ESPP”) [Member] Exchange Warrants [Member] January 10, 2019 [Member] New Directors [Member] Non-employee Directors [Member] Non-Streamline Period [Member] Number of stockholders votes. Office Sublease [Member] Options to Purchase Common Stock [Member] Other Recurring Revenue [Member] Preferred stock par value per share. Preferred stock redemption, triggering event, Percent of common stock sold threshold Prepaid commissions, Current And Noncurrent Product Shipped, Revenue Deferred [Member] Range Five [Member]. PIPE Warrants [Member] Range of Exercise Prices Five [Member] Range of Exercise Prices Four [Member] Range of Exercise Prices One [Member] Range of Exercise Prices Seven [Member] Range of Exercise Prices Six [Member] Range of Exercise Prices Three [Member] Range of Exercise Prices Two [Member] PIPE Warrants [Member] PIPE Warrants [Member] PIPE Warrants [Member] Revenue from System Delivery and Installation [Membe Royalty Revenue [Member] Series A Convertible Preferred Stock and Accumulated Dividends [Member] Series A Convertible Preferred Stock [Membe Series A Convertible Preferred Stock Series [Member] Standard product warranty, coverage term Stock Award Plans [Member] Streamline Period [Member] The total number Niobe ES systems installed. Systems [Member] Time-Based Restricted Shares [Member] 2012 Stock Incentive Plan [Member] 2009 Employee Stock Purchase Plan ("ESPP") [Member] Unimproved Space [Member] Warrants Issued August 2013 [Member] Warrants Issued September 2016 [Member] Contract asset and liability [Policy Text Block] Sublease Revenue [Member]. Stock Options and Stock Appreciation Rights [Member] Primary Lender [Member] Increased in common shares outstanding. Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year. Cost of subleased portion of operating lease. Convertible securities, Conversion price per share. Series B Convertible Preferred Stock [Member] Sublease [Member] Undiscounted future cash flows to be received under the sublease reminder of fiscal year. Undiscounted future cash flows to be received under the sublease year two. Undiscounted future cash flows to be received under the sublease year three. Assets, Current Assets [Default Label] Liabilities, Current Liabilities Treasury Stock, Common, Value Stockholders' Equity Attributable to Parent Liabilities and Equity CostOfSublease Gross Profit Operating Expenses Operating Income (Loss) Preferred Stock Dividends, Income Statement Impact Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Diluted Common Stock, Shares, Outstanding Share-based Payment Arrangement, Noncash Expense Gain (Loss) on Disposition of Assets Derivative, Gain (Loss) on Derivative, Net Increase (Decrease) in Accounts Receivable Increase (Decrease) in Inventories Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Accounts Payable Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Contract with Customer, Liability Increase (Decrease) in Other Operating Liabilities Net Cash Provided by (Used in) Operating Activities Payments to Acquire Productive Assets Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Financing Activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Inventory Valuation Reserves Prepaid Expense and Other Assets Prepaid Expense and Other Assets, Noncurrent Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Lease, Cost Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, Undiscounted Excess Amount Accrued Liabilities [Default Label] Other Accrued Liabilities, Noncurrent Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period 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, 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 Standard and Extended Product Warranty Accrual, Decrease for Payments