Quarterly report pursuant to Section 13 or 15(d)

Description of Business and Basis of Preparation - Additional Information (Detail)

v3.21.2
Description of Business and Basis of Preparation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Accumulated deficit $ 330,236   $ 330,236   $ 326,613
Cash and cash equivalents 100,109   100,109   $ 93,041
Income tax benefit $ 50 $ 0 3,088 $ 3,144  
New Jersey          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Income tax benefit     $ 4,100