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Equity Incentive Plans - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2023
Jan. 01, 2022
Dec. 31, 2020
Equity Incentive Plans          
Option term 10 years        
Shares available to award 456,381 707,250     157,321
Percentage of number of shares added each year 5.00% 5.00%      
Weighted-average grant date fair value per share of stock options granted $ 1.01 $ 1.95      
Fair value of restricted stock awards vested $ 11,000 $ 17,000      
Vesting Period 4 years        
Vesting percentage 25.00%        
Stock-based compensation $ 398,000 57,000      
Total unrecognized compensation costs $ 894,000        
Weighted-average amortization period 2 years 11 months 23 days        
Company estimated the fair value of share-based payment awards Black-Scholes options valuation model        
Income tax benefits relating to stock-based compensation expenses $ 0        
Tax benefits from exercised stock options $ 0        
Share-based Payment Arrangement, Employee          
Equity Incentive Plans          
Percentage of voting power 10.00%        
Exercise price on percentage of fair market value per share on the date of grant 110.00%        
Share-based Payment Arrangement, Nonemployee          
Equity Incentive Plans          
Exercise price on percentage of fair market value per share on the date of grant 100.00%        
Incentive Stock Option | Optionees with More than 10% of Voting Power          
Equity Incentive Plans          
Option term 5 years        
Employee Stock Option          
Equity Incentive Plans          
Aggregate Intrinsic Value $ 52,000 $ 523,000      
2021 Plan          
Equity Incentive Plans          
Number of shares authorized       485,761  
Shares available to award 456,381        
Percentage of voting power 10.00%        
2021 Plan | Subsequent Events [Member]          
Equity Incentive Plans          
Number of shares authorized     483,887