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Summary of Activity for Stock Options (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Stock Options Number Outstanding    
Beginning Balance 505,593  
Ending Balance 505,593 505,593
Vested or expected to vest as of March 31, 2023 505,593  
Exercisable as of March 31, 2023 505,593  
Stock Options Aggregate Intrinsic Value    
Beginning Balance $ 1,280,805  
Ending Balance 791,309 $ 1,280,805
Vested or expected to vest as of March 31, 2023 791,309  
Exercisable as of March 31, 2023 $ 791,309  
Stock Options Remaining Contractual Life (in years)    
Weighted Average Remaining Contractual Term (Years) 2 years 11 months 4 days 3 years 2 months 1 day
Vested or expected to vest as of March 31, 2023 2 years 11 months 4 days  
Exercisable as of March 31, 2023 2 years 11 months 4 days  
Stock Options Weighted Average Exercise Price per share    
Beginning Balance $ 5.05  
Ending Balance 5.05 $ 5.05
Vested or expected to vest as of March 31, 2023 5.05  
Exercisable as of March 31, 2023 $ 5.05