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) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Share-based compensation      
Number of shares, Outstanding at beginning of period 2,730,068    
Number of shares, Exercised (134,959) 0  
Number of shares, Forfeited, expired or cancelled (26,014)    
Number of shares, Outstanding at end of period 2,569,095   2,730,068
Number of shares, Exercisable at end of period 2,009,056    
Weighted Average Exercise Price Per Share, Outstanding at beginning of period $ 20.88    
Weighted Average Exercise Price Per Share, Exercised 4.61    
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 178.20    
Weighted Average Exercise Price Per Share, Outstanding at end of period 20.15   $ 20.88
Weighted Average Exercise Price Per Share, Exercisable at end of period $ 19.12    
Weighted Average Contractual Remaining Term, Outstanding 6 years 3 months 7 days   6 years 3 months 14 days
Weighted Average Contractual Remaining Term, Exercisable 5 years 7 months 6 days    
Aggregate Intrinsic Value, Outstanding $ 17,723   $ 10,638
Aggregate Intrinsic Value, Exercisable 16,131    
Options exercised, aggregate intrinsic value 2,500    
Employee Stock Option      
Share-based compensation      
Stock-based compensation expense 1,100    
Unrecognized compensation expense related to stock options (in dollars) $ 7,000    
Weighted average period over which unrecognized compensation expense is expected to be recognized 2 years 4 months 24 days