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Note 8 - Stockholders' Equity - Allocation of Share-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Stock-based compensation expense $ 3,183 $ 4,371 $ 6,151 $ 7,803
Amount of income tax expense (benefit) recognized in earnings 1,389 (89) 517 (2,081)
Stock-based compensation expense, net of tax $ 4,572 $ 4,282 $ 6,668 $ 5,722