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Termination Costs - Summary of Termination Costs (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Restructuring And Related Activities [Abstract]    
Severance costs $ 1,595 $ 0
Stock-based compensation 0 0
Total termination costs $ 1,595 $ 0