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Property and Equipment, Net - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property Plant And Equipment [Line Items]    
Gross property and equipment $ 1,732 $ 1,658
Accumulated depreciation and amortization (1,256) (1,028)
Property and equipment, net 476 630
Property and Equipment [Member]    
Property Plant And Equipment [Line Items]    
Gross property and equipment 1,477 1,403
Leasehold Improvements [Member]    
Property Plant And Equipment [Line Items]    
Gross property and equipment $ 255 $ 255