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Stock Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jan. 31, 2023
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Jun. 13, 2023
Oct. 31, 2020
Stock-based compensation                  
Common stock, shares issued 12,642,822   12,642,822   12,642,822   12,539,189    
Options exercised (in shares)         0 0      
Stock-based compensation costs before income taxes     $ 359 $ 350 $ 760 $ 731      
Employee Stock Option [Member]                  
Stock-based compensation                  
Options granted (in shares)         650,128 517,337      
Employee Stock Option [Member] | Options Vesting On Third Anniversary Of Grant [Member]                  
Stock-based compensation                  
Stock awards vesting period         3 years        
Options granted (in shares)         384,500        
Employee Stock Option [Member] | Minimum                  
Stock-based compensation                  
Options granted, grant date fair value         $ 0.42 $ 0.86      
Employee Stock Option [Member] | Maximum                  
Stock-based compensation                  
Options granted, grant date fair value         $ 0.73 $ 2.90      
Restricted Stock Units (RSUs)                  
Stock-based compensation                  
Stock awards vesting period   3 years              
Restricted Stock Units, Granted 127,314 257,000     384,314   118,665    
Restricted Stock Units outstanding/unvested 521,971   521,971   521,971        
Restricted stock units, grant date fair value $ 1.08 $ 0.90 $ 1.08   $ 1.08        
2018 Equity Incentive Plan (the "2018 Plan") [Member]                  
Stock-based compensation                  
Number of shares reserved for issuance 323,326   323,326   323,326        
Number of authorized shares               900,000  
2018 Equity Incentive Plan (the "2018 Plan") [Member] | Minimum                  
Stock-based compensation                  
Stock awards vesting period         1 year        
2018 Equity Incentive Plan (the "2018 Plan") [Member] | Maximum                  
Stock-based compensation                  
Stock awards vesting period         4 years        
Life of stock option awards granted         10 years        
Inducement Equity Incentive Plan 2020 [Member]                  
Stock-based compensation                  
Number of shares reserved for issuance 80,000   80,000   80,000        
Common stock, shares issued 120,000   120,000   120,000        
Inducement Equity Incentive Plan 2020 [Member] | Minimum                  
Stock-based compensation                  
Number of authorized shares                 200,000