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Shareholders' Equity - Additional Information (Details) - USD ($)
12 Months Ended
Mar. 02, 2022
Jan. 18, 2022
Nov. 09, 2021
Dec. 31, 2022
Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation       $ 130,000 $ 110,000
Unrecognized compensation costs related to non-vested stock options       $ 0  
Period over which compensation costs related to non-vested stock options recognize       2 years  
Tax benefit from recording non-cash expense relates to options granted to employees       $ 0  
Shares Held in Employee Stock Option Plan, Allocated       0 14,000
General and Administrative Expense          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation       $ 10,000 $ 54,000
Common Stock          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of options granted       0 0
2022 Individual Employee Grant | Anniversary Grant Date          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Vesting percentage       0.66%  
Restricted Stock Units (RSUs)          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized compensation costs related to non-vested stock options       $ 145,000  
Period over which compensation costs related to non-vested stock options recognize       3 years  
Restricted Stock Units (RSUs) | General and Administrative Expense          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation       $ 79,000 $ 56,000
Restricted Stock Units (RSUs) | 2022 Individual Employee Grant          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Vesting percentage   0.33%      
Vesting description       The 2022 Individual Employee Grant vested one-third on the initial grant date, and the remaining two-thirds will vest on each anniversary of the grant date.  
Number of restricted stock units granted   25      
Restricted stock shares granted in period granted date fair value   $ 10,000      
Restricted Stock Units (RSUs) | 2022 Individual Executive Grant | Anniversary Grant Date          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of restricted stock units granted 15        
Restricted stock shares granted in period granted date fair value $ 18,000        
2015 Plan          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares available for future equity grants under 2015 Plan       1,851,000 1,530,000
2015 Plan | Maximum          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares available for future equity grants under 2015 Plan       1,706  
2015 Plan | Restricted Stock Units (RSUs) | 2021 Employee Grant | Anniversary Grant Date | Executives And Employees          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Shares awarded under plan     107    
Vesting percentage     0.33%    
Vesting description       The 2021 Employee Grant vests in thirds on each anniversary of the grant date.