Related Party Transactions - Additional Information (Detail) - USD ($) |
1 Months Ended | 12 Months Ended | ||
---|---|---|---|---|
Jan. 27, 2016 |
Jul. 31, 2018 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Related Party Transaction [Line Items] | ||||
Research and development expense | $ 87,236,000 | $ 54,974,000 | ||
License Agreement [Member] | ||||
Related Party Transaction [Line Items] | ||||
Provision for maximum cash payment | $ 2,000,000 | |||
Research and development expense | 381,000 | 821,000 | ||
License Agreement [Member] | Stock Purchase Agreement [Member] | ||||
Related Party Transaction [Line Items] | ||||
Common stock issued for initial consideration for license | 1,161,665 | |||
Sub-lease Agreement [Member] | Officers and Board Members [Member] | ||||
Related Party Transaction [Line Items] | ||||
Expense related to related party | $ 1,488,000 | $ 1,451,000 |