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Leases - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Square feet of office space | ft² 96,000    
Average initial lease term 5 years    
Discount rate 3.90%    
Operating leases, rent expense, net $ 1.7 $ 1.8 $ 1.6
Total lease payments 1.7 1.5 1.7
Lease obligation incurred $ 0.5 $ 3.1 $ 0.2
Minimum [Member]      
Lease term range 1 year    
Maximum [Member]      
Lease term range 4 years 3 months 18 days    
Weighted Average [Member]      
Lease term range 3 years 3 months 18 days