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Stock-Based Compensation - Service Based Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Weighted Average Grant-Date Fair Value          
Stock based compensation expenses $ 212 $ 176 $ 714 $ 94  
Restricted stock units - service based awards          
Number of Shares          
Unvested at beginning of period (in shares)     125,000 29,289 29,289
Granted (in shares)     313,065 125,000  
Vested (in shares)     (125,000) (23,515)  
Forfeited (in shares)     (25,665) (5,774)  
Unvested at end of period (in shares) 287,400 125,000 287,400 125,000 125,000
Weighted Average Grant-Date Fair Value          
Unvested at beginning of period (in dollars per share)     $ 1.47 $ 12.87 $ 12.87
Granted (in dollars per share)     1.87 1.47  
Vested (in dollars per share)     1.47 11.33  
Forfeited (in dollars per share)     1.37 19.00  
Unvested at end of period (in dollars per share) $ 1.85 $ 1.47 $ 1.85 $ 1.47 $ 1.47
Stock based compensation expenses $ 112 $ 46 $ 276 $ 84  
Unrecognized stock-based compensation expense $ 400   $ 400    
Unrecognized stock-based compensation expense, weighted average remaining term (in years) (less than)     1 year 4 months 24 days    
Restricted stock units - service based awards | Minimum          
Weighted Average Grant-Date Fair Value          
Vesting period     1 year    
Restricted stock units - service based awards | Maximum          
Weighted Average Grant-Date Fair Value          
Vesting period     3 years