Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands |
1 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Aug. 31, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Class of Stock [Line Items] | ||||
Proceeds from issuance of common stock, net of issuance costs | $ 271,500 | $ 62,870 | $ 328,789 | |
Share of common stock issued | 7,187,500 | |||
Option To Purchase Additional Shares | ||||
Class of Stock [Line Items] | ||||
Share of common stock issued | 937,500 | |||
Cersci Therapeutics | ||||
Class of Stock [Line Items] | ||||
Stock issued in connection with acquisition, shares | 1,200,000 | |||
Issuance of common stock in connection with merger agreement | $ 44,300 |