Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | |
---|---|---|---|
Mar. 31, 2021 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Gross proceeds from the sale of preferred shares | $ 29,990 | $ 80,934 | |
Share-based Payment Arrangement, Tranche Two [Member] | Series B Preferred Stock [Member] | |||
Sale of Stock, Price Per Share | $ 1.32 | ||
Gross proceeds from the sale of preferred shares | $ 28,400 |