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Schedule of Components of Restricted Stock Liabilities (Details) - USD ($) |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 15, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Restricted Stock Liabilities |  |  |  |  |
Restricted stock liabilities recorded upon modification of the restricted stock awards and units (1,064,549 restricted stock to be purchased at $4.00 per share) |  | $ 4,258,196 |  | $ 4,258,196 |
Less imputed interest |  | (457,462) |  | (457,462) |
Present value of restricted stock liabilities | $ 3,800,734 | 3,800,734 |  | 3,800,734 |
Less payments (excluding imputed interest) |  | (1,342,379) |  | (177,425) |
Restricted stock liabilities |  | 2,458,355 |  | 3,623,309 |
Current portion of restricted stock liabilities |  | 1,936,734 |  | 1,627,499 |
Long-term portion of restricted stock liabilities |  | 521,621 |  | 1,995,810 |
Total restricted stock liabilities |  | 2,458,355 |  | 3,623,309 |
Less prepayments |  | $ (1,164,955) |  | $ (177,425) |

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