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Related Parties - Additional Information (Detail) - Consulting Agreements [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Related Party Transaction [Line Items]          
Consulting agreement annual fee       $ 68  
Consulting fee $ 17 $ 17   $ 51 $ 51
Scientific Advisory Board [Member]          
Related Party Transaction [Line Items]          
Consulting fee     $ 5    
Common Stock [Member] | Scientific Advisory Board [Member]          
Related Party Transaction [Line Items]          
Shares, Granted     5,000    
Total Fair value     $ 13    
Vesting period     2 years