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Stock Options and Restricted Stock Units - Summary of stock option and Restricted Stock option activity (Details) - Restricted Stock Units - Equity Plans - $ / shares
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Stock Options    
Number of Restricted Stock Units, Unvested at Beginning of the year 749,756 700,000
Number of Restricted Stock Units, Granted 0 0
Number of Restricted Stock Units, Forfeited/Expired (995)  
Number of Restricted Stock Units, Unvested at End of the year 748,761 700,000
Weighted-Average Grant Date Fair Value, Outstanding at Beginning of the year $ 5.77 $ 5.59
Weighted-Average Grant Date Fair Value, Granted   0
Weighted-Average Grant Date Fair Value, Forfeited/Expired 8.29  
Weighted-Average Grant Date Fair Value, Outstanding at End of the year $ 5.78 $ 5.59