Stock-based Compensation (Details) - USD ($) $ / shares in Millions, $ in Millions |
1 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Apr. 06, 2020 |
Feb. 17, 2021 |
Jul. 31, 2019 |
Sep. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Jul. 15, 2021 |
|
| Stock-based Compensation (Details) [Line Items] | |||||||
| Common stock, shares reserved for issuance | 1,302,326 | ||||||
| Authorized for issuance of shares | 1,159,065 | ||||||
| Increase in issuance of authorized shares | 348,837 | 1,767,442 | 33,263 | 33,263 | |||
| authorized for issuance | 465,116 | ||||||
| Shares available for future grant | 17,442 | ||||||
| Fair value of options granted (in Dollars per share) | $ 1.3 | ||||||
| Unrecognized compensation cost (in Dollars) | $ 1.5 | ||||||
| Weighted average period | 2 years 8 months 12 days | ||||||
| Expected dividend | 0.00% | ||||||
| Compensation cost description | During July 2021, in connection with the appointment of Dr. Brigitte Schiller to the Company’s board of directors, the Company granted Dr. Schiller 17,882 stock options with a ten year term, an exercise price of $5.00 per option, and a total fair value of $50,000 on the date of grant. Additionally, the Company granted Dr. Schiller 26,738 restricted stock units with a grant date fair value of $100,000. Subject to Dr. Schiller’s continued service, such options and restricted stock units shall vest upon the one-year anniversary of the date of grant. As of September 30, 2021, the unrecognized compensation cost related to outstanding restricted stock units was $0.1 million, which is expected to be recognized as expense over approximately 9 months. | ||||||
| Two Thousand Nineteen [Member] | |||||||
| Stock-based Compensation (Details) [Line Items] | |||||||
| Authorized for issuance of shares | 232,558 | ||||||
| Shares issued for future grants | 75,581 | ||||||