v3.20.4

Stockholders' Equity (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
May 01, 2019 | Jun. 22, 2017 | Feb. 28, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividends |  |  |  |  | $ 0 | $ 86,207
Issuance of common stock |  |  |  |  |  | $ 5,928,235
Private Placement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Purchase price per share (in usd per share) |  |  | $ 0.95 |  |  |
Registered Public Offering |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued in transaction (in shares) | 4,000,000.0 |  |  |  |  |
Proceeds from issuance of common stock | $ 2,900,000 |  |  |  |  |
Purchase price per share (in usd per share) | $ 0.74 |  |  |  |  |
Cowen Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  | $ 1,500,000 |  |
Issuance of common stock |  | $ 25,000,000.0 |  |  |  |
Common stock sold (in shares) |  |  |  | 1,600,000 |  |
Benjamin Samuels | Private Placement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued in transaction (in shares) |  |  | 841,928 |  |  |
Gerald Budde | Private Placement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued in transaction (in shares) |  |  | 26,310 |  |  |
Subscription Agreements |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Shares issued in transaction (in shares) |  |  | 1,600,000 |  |  |
Proceeds from issuance of common stock |  |  | $ 1,500,000 |  |  |
Purchase of common stock (in shares) | 116,496 |  |  |  |  |
Deemed dividends | $ 86,207 |  |  |  |  |

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