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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