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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, 2024
Dec. 31, 2023
Stock Options Number Outstanding    
Beginning Balance 494,960  
Cancelled or Expired (7,500)  
Ending Balance 487,460 494,960
Vested or expected to vest as of March 31, 2024 487,460  
Exercisable as of March 31, 2024 487,460  
Stock Options Average Intrinsic Value    
Beginning Balance $ 1,725,985  
Ending Balance 1,583,118 $ 1,725,985
Vested or expected to vest as of March 31, 2024 1,583,118  
Exercisable as of March 31, 2024 $ 1,583,118  
Stock Options Remaining Contractual Life (in years)    
Weighted Average Remaining Contractual Term (Years) 2 years 3 days 2 years 2 months 23 days
Vested or expected to vest as of March 31, 2024 2 years 3 days  
Exercisable as of March 31, 2024 2 years 3 days  
Stock Options Weighted Average Exercise Price per share    
Beginning Balance $ 4.99  
Cancelled or Expired 8.97  
Ending Balance 4.93 $ 4.99
Vested or expected to vest as of March 31, 2024 4.93  
Exercisable as of March 31, 2024 $ 4.93