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Leases - Additional Information (Detail)
$ in Thousands
3 Months Ended
Mar. 01, 2018
USD ($)
ft²
Mar. 31, 2022
USD ($)
Lease
Mar. 31, 2021
USD ($)
Operating lease, weighted average discount rate, percent   13.00%  
Number of new leases | Lease   0  
Remaining terms   1 year  
Operating Lease, Payments   $ 35 $ 34
Building [Member]      
Leased spaced area | ft² 5,600    
Operating lease term 60 months    
Building [Member] | Minimum [Member]      
Operating lease rent expense $ 10    
Building [Member] | Maximum [Member]      
Operating lease rent expense $ 12    
Office Equipment [Member]      
Operating lease rent expense   $ 39 $ 30