Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

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Stock-Based Compensation - Stock Option Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Number of Options    
Outstanding at beginning of year (in shares) 812,945  
Expired (in shares) (703)  
Forfeited (in shares) (8,672)  
Outstanding at end of year (in shares) 803,570 812,945
Exercisable and vested at the end of year (in shares) 238,121  
Weighted- Average Exercise Price    
Outstanding at beginning of year (in usd per share) $ 4.26  
Expired (in usd per share) 374.50  
Forfeited (in usd per share) 0.93  
Outstanding at end of year (in usd per share) 3.97 $ 4.26
Vested and expected to vest at end of year (in usd per share) $ 10.26  
Weighted- Average Remaining Term in Years    
Outstanding 9 years 3 months 10 days 9 years 6 months 21 days
Exercisable and vested at the end of year 9 years 7 days