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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 21 Months Ended
Jun. 21, 2024
Jun. 13, 2023
Jan. 31, 2023
Jun. 30, 2024
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Sep. 30, 2024
Oct. 31, 2020
Stock-based compensation                  
Remaining unrecognized compensation cost of non-vested stock options         $ 0.2     $ 0.2  
Weighted-average remaining requisite service period of recognition of unrecognized compensation cost         1 year 5 months 12 days        
Stock options                  
Stock-based compensation                  
Stock awards vesting period         6 months        
Options granted (in shares)         12,500 43,342      
Options granted, grant date fair value         $ 1.77        
Options exercised (in shares)               0  
Vesting period           3 years      
Stock options | Minimum                  
Stock-based compensation                  
Options granted, grant date fair value           $ 6.32      
Stock options | Maximum                  
Stock-based compensation                  
Options granted, grant date fair value           $ 10.98      
Stock options | Options Vesting On Third Anniversary Of Grant                  
Stock-based compensation                  
Options granted (in shares)           25,633      
Restricted Stock Units (RSUs)                  
Stock-based compensation                  
Stock awards vesting period     3 years            
Restricted Stock Units, Granted     17,133   12,500        
Restricted stock units, grant date fair value     $ 13.50            
Vesting period         6 months        
Shares forfeited         7,251   300    
Additional shares forfeited         7,077        
Granted         $ 2.28        
2018 Plan                  
Stock-based compensation                  
Number of additional shares authorized 160,000 60,000              
Number of shares reserved for issuance       204,000          
Life of stock option awards granted       10 years          
2018 Plan | Minimum                  
Stock-based compensation                  
Stock awards vesting period       1 year          
2018 Plan | Maximum                  
Stock-based compensation                  
Stock awards vesting period       4 years          
Inducement Plan                  
Stock-based compensation                  
Number of authorized shares         8,000     8,000 13,333
Number of shares reserved for issuance         5,333     5,333