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Stock Based Compensation - Fair value of options granted (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Stock Based Compensation    
Approximate risk-free rate 4.28% 1.02%
Volatility 46.86% 59.97%
Average expected life (years) 6 years 6 years
Weighted-average grant date fair value $ 3.11 $ 0.95
Estimated fair value of total options granted $ 5,165 $ 31