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Commitments and Contingencies - Schedule of Components of Leases Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Operating lease cost $ 331 $ 127
Short-term lease cost   41
Sublease income (28) (28)
Total lease cost $ 303 $ 140