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Nature of the Business - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]          
Net income loss $ (9,794) $ (7,384) $ (18,165) $ (15,857) $ (32,800)
Retained earnings accumulated deficit (165,142)   (165,142)   (146,977)
Cash and cash equivalents, at carrying value $ 36,425   $ 36,425   $ 45,001