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Receivable on sale of net operating losses.

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Repayment of outstanding indebtedness amount.

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Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The cash inflow associated with the amount received by a corporation from a shareholder during the period.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Financial Condition and Business Plan (Details Narrative) - USD ($)					1 Months Ended				6 Months Ended	12 Months Ended
	Jun. 16, 2021	May 10, 2021	Mar. 19, 2021	Aug. 28, 2020	Jun. 18, 2021	Jan. 31, 2021	Sep. 30, 2020	Jun. 30, 2018	Jun. 30, 2021	Dec. 31, 2019	Dec. 31, 2018	Apr. 05, 2021	Dec. 31, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Retained Earnings (Accumulated Deficit)									$ 323,137,741				$ 312,000,341
[custom:CashAndCashEquivalentsRestrictedCashShorttermInvestmentsAndReceivableOnSaleOfNetOperatingLosses-0]									64,500,000
[custom:ReceivableOnSaleOfNetOperatingLosses-0]									$ 1,850,000
Horizon Credit Agreement [Member] \| Horizon Technology Finance Corporation [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Proceeds from Contributed Capital								$ 10,000,000
Debt Instrument, Face Amount				$ 10,000,000
Horizon Credit Agreement [Member] \| Horizon Technology Finance Corporation [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								7.625%
Amendment to Horizon Credit Agreement [Member] \| Horizon Technology Finance Corporation [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Repayments of Notes Payable				5,000,000
Debt Instrument, Face Amount				5,000,000
Debt instrument related end term charges				$ 200,000
SVB Loan Facility [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					3.25%
Line of Credit Facility, Maximum Borrowing Capacity					$ 10,000,000
Line of Credit Facility, Remaining Borrowing Capacity					$ 4,000,000
Debt Instrument, Description					Payments under the loan agreement are interest only for the first 24 months after loan closing, followed by a 24-month amortization period of principal and interest through the scheduled maturity date.				Payments under the loan agreement are interest only for the first 24 months after loan closing, followed by a 24-month amortization period of principal and interest through the scheduled maturity date.
SVB Loan Facility [Member] \| Silicon Valley Bank [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 10,000,000				$ 10,000,000
Line of Credit Facility, Remaining Borrowing Capacity									$ 4,000,000
SVB Loan Facility [Member] \| Prime Rate [Member] \| Silicon Valley Bank [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									3.25%
SVB Loan Facility [Member] \| Horizon Technology Finance Corporation [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:RepaymentOfOutstandingIndebtednessAmount-0]									$ 6,000,000
Capital on DemandTM Sales Agreement [Member] \| Jones Trading Institutional Services, LLC [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:CashAndCashEquivalentsRestrictedCashShorttermInvestmentsAndReceivableOnSaleOfNetOperatingLosses-0]									$ 64,500,000
Proceeds from Contributed Capital			$ 6,900,000
Debt Instrument, Face Amount						$ 35,000,000						$ 15,000,000
Proceeds from Warrant Exercises						$ 1,500,000
New Jersey [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:NetProceedsFromSaleOfNetOperatingLosses]	$ 1,600,000						$ 2,000,000.0			$ 12,200,000	$ 13,000,000
New Jersey [Member] \| Minimum [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:NetProceedsFromSaleOfNetOperatingLosses]		$ 15,000,000
New Jersey [Member] \| Maximum [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:NetProceedsFromSaleOfNetOperatingLosses]	$ 1,400,000	$ 20,000,000