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Stock-Based Compensation - Additional Information (Details)
3 Months Ended
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2021
USD ($)
Jan. 20, 2021
Aug. 31, 2018
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock exchange ratio     0.90686  
Stock-based compensation expense | $ $ 113,000 $ 110,000    
Unrecognized compensation cost related to equity award grants | $ $ 1,100,000      
Unrecognized compensation cost expected remaining vesting period 2 years 9 months      
2018 Equity Incentive Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock exchange ratio     0.90686  
Number of stock option grants 0      
Number of restricted stock grants 0      
2018 Equity Incentive Plan | Restricted Stock | Common Stock        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares approved under the plan       133,987
2018 Equity Incentive Plan | Stock Options | Common Stock        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares approved under the plan       334,970