v3.22.2.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income tax provision at statutory rate 21.00% 21.00%  
Increase in valuation allowance $ 1,616 $ 885  
Unrecognized tax benefits income tax penalties accrued 0 0  
Unrecognized tax benefits Interest on income taxes accrued 0 0  
Amount defer related to certain payroll taxes   35  
Amount received from paycheck protection program loan   156  
Grant received from economic injury disaster loan   8  
Unrecognized tax benefits, increase resulting from current period tax positions 20 7  
Unrecognized tax benefits $ 53 33 $ 26
Maximum [Member]      
Open tax year 2021    
Minimum [Member]      
Open tax year 2016    
State and Local Jurisdiction [Member]      
Net operating loss carryforwards $ 14,546 9,184  
Expiration period 2031    
State and Local Jurisdiction [Member] | Research [Member]      
Tax credit carryforward $ 178    
Domestic Tax Authority [Member]      
Net operating loss carryforwards $ 14,965 $ 9,370  
Expiration period 2036    
Indefinitely Carryforward [Member] | Domestic Tax Authority [Member]      
Net operating loss carryforwards $ 14,520