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Leases - Summary of Lease Cost (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Operating lease cost $ 1,523 $ 817
Total lease cost 1,523 817
Cash paid for amounts included in the measurement of lease liabilities $ 1,441 $ 817