Stockholders' Equity - Warrants Outstanding (Details) - $ / shares |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Equity [Abstract] | |||
| Warrants outstanding (in shares) | 422,549 | 422,549 | 15,277 |
| Exercise price of warrants (in dollars per share) | $ 0.11 | $ 0.11 | $ 2.75 |
| Weighted average remaining life | 1 year 4 months 13 days | 2 years 1 month 13 days |
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- Definition Class Of Warrant Or Right, Weighted Average Remaining Life No definition available.
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of warrants or rights outstanding. No definition available.
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- References No definition available.
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