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Financial Condition and Business Plan (Details Narrative) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 01, 2022 | Jun. 18, 2021 | Aug. 28, 2020 | Apr. 30, 2022 | Jun. 30, 2018 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2021
Cumulative net losses |  |  |  |  |  | $ 343,243,923 |  |  |  |  | $ 332,769,591
Cash and cash equivalents, short-term investments |  |  |  |  |  | 47,300,000 |  |  |  |  |
Net proceeds from sale of net operating losses |  |  |  |  |  |  | $ 1,400,000 | $ 1,900,000 |  |  |
Series A & B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of redeemable preferred stock |  |  |  |  |  | $ 7,000,000.0 |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term investments |  |  |  | $ 7,000,000.0 |  |  |  |  |  |  |
Subsequent Event [Member] | Series A & B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of redeemable preferred stock | $ 1,300,000 |  |  |  |  |  |  |  |  |  |
Horizon Credit Agreement [Member] | Horizon Technology Finance Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 7.625% |  |  |  |  |  |
SVB Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |
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 (calculated based on one-month LIBOR plus 7.625%) for the first 24 months through July 2020, followed by a 21-month amortization period of principal and interest starting on August 1, 2020 and ending through the scheduled maturity date on April 1, 2023. |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.25% |  |  |  |  |  |  |  |  |
Debt instrument maturity date |  |  |  |  |  | Apr. 01, 2023 |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 10,000,000 |  |  |  |  |  |  |  |  |
Line of credit facility, remaining borrowing capacity |  | 4,000,000 |  |  |  |  |  |  |  |  |
SVB Loan Facility [Member] | Silicon Valley Bank [Member] |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 3.25% |  |  |  |  |
SVB Loan Facility [Member] | Horizon Technology Finance Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Repayment of outstanding in-debtedness amount |  |  |  |  |  | $ 6,000,000 |  |  |  |  |
Line of credit deposited amount |  |  |  |  |  | 6,000,000 |  |  |  |  |
Amendment to Horizon Credit Agreement [Member] | Horizon Technology Finance Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | 5,000,000 |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 5,000,000 |  |  |  |  |  |  |  |
Debt instrument related end term charges |  |  | $ 200,000 |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term investments |  |  |  |  |  | 3,500,000 |  |  |  |  |
New Jersey [Member] |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of net operating losses |  |  |  |  |  |  | 1,500,000 | $ 2,000,000.0 | $ 12,200,000 | $ 13,000,000 |
New Jersey [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of net operating losses |  |  |  |  |  |  | 15,000,000 |  |  |  |
New Jersey [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of net operating losses |  |  |  |  |  |  | $ 20,000,000 |  |  |  |
Operating Costs and Expenses |  |  |  |  |  | $ 3,500,000 |  |  |  |  |

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