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Stock Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 13, 2023
Jun. 30, 2023
Jan. 31, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Jun. 14, 2022
Oct. 31, 2020
Stock-based compensation                    
Common stock, shares issued       12,642,822   12,642,822   9,422,089    
Options exercised (in shares)           0 0      
Stock-based compensation costs before income taxes       $ 390 $ 389 $ 1,151 $ 1,119      
Stock options                    
Stock-based compensation                    
Options granted (in shares)           650,128 522,337      
Stock options | Options Vesting On Third Anniversary Of Grant [Member]                    
Stock-based compensation                    
Stock awards vesting period           3 years        
Options granted (in shares)           384,500        
Stock options | Minimum                    
Stock-based compensation                    
Options granted, grant date fair value           $ 0.42 $ 0.83      
Stock options | 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              
Options granted, grant date fair value   $ 0.59                
Restricted Stock Units, Granted   127,314 257,000         118,665    
Restricted Stock Units outstanding/unvested       521,971   521,971        
Restricted stock units, grant date fair value     $ 0.90 $ 1.08   $ 1.08   $ 1.11    
Modified Stock Options And Restricted Stock Units [Member]                    
Stock-based compensation                    
Restricted Stock Units, Granted           384,314        
2018 Equity Incentive Plan (the "2018 Plan") [Member]                    
Stock-based compensation                    
Number of shares reserved for issuance 336,984                  
Life of stock option awards granted 10 years                  
Number of authorized shares 900,000               500,000  
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                  
Inducement Equity Incentive Plan 2020 [Member]                    
Stock-based compensation                    
Number of shares reserved for issuance       80,000   80,000        
Common stock, shares issued       120,000   120,000        
Inducement Equity Incentive Plan 2020 [Member] | Minimum                    
Stock-based compensation                    
Number of authorized shares                   200,000