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Stockholders' Equity - Compensation Expense & Tax Benefit (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Compensation expense for stock options        
Compensation expense (benefit) $ 291 $ 160 $ 505 $ 282
Related tax benefit (expense)   $ 34   $ 62
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Balance of Fiscal 2021 425   425  
Fiscal 2022 521   521  
Fiscal 2023 282   282  
Fiscal 2024 $ 23   $ 23