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Stock-Based Compensation - Stock-based compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Stock-based compensation expense $ 450 $ 30 $ 1,617 $ 711
Stock options        
Stock-based compensation expense 124 74 523 436
Restricted stock units        
Stock-based compensation expense 161 87 465 71
Performance stock units        
Stock-based compensation expense 152   246  
Deferred stock units        
Stock-based compensation expense $ 13 $ (131) $ 383 $ 204