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Earnings Per Share - Basic and diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Numerator:        
Net earnings $ 4,495 $ 3,820 $ 8,548 $ 5,145
Denominator:        
Basic weighted average shares outstanding 9,549 9,654 9,572 9,667
Effect of dilutive securities:        
Employee share-based awards 115 32 83 19
Diluted weighted average shares outstanding 9,664 9,686 9,655 9,686
Basic earnings per share $ 0.47 $ 0.39 $ 0.89 $ 0.53
Diluted earnings per share $ 0.47 $ 0.39 $ 0.89 $ 0.53