Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Performance stock units activity (Details)

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Stock-Based Compensation - Performance stock units activity (Details) - Unvested performance stock units - $ / shares
6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Number of Shares    
Outstanding, beginning balance (in shares) 864,000  
Granted (in shares) 0  
Vested (in shares) (432,000)  
Cancelled (in shares) (25,000)  
Outstanding, ending balance (in shares) 407,000  
Grant Date Fair Value    
Outstanding, beginning balance (in dollars per share) $ 2.65 $ 2.65
Granted (in dollars per share) 0  
Vested (in dollars per share) 2.65  
Cancelled (in dollars per share) 2.65  
Outstanding, ending balance (in dollars per share) $ 2.65 $ 2.65