Quarterly report [Sections 13 or 15(d)]

Note 9 - Stockholders' Equity (Details Textual)

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Note 9 - Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Jan. 12, 2016
Jul. 28, 2015
Common Stock, Dividends, Per Share, Declared (in dollars per share) $ 0.2 $ 0.2 $ 0.2 $ 0.2        
Dividends, Common Stock         $ 4.6 $ 4.6    
Stock Repurchase Program, Authorized Amount             $ 70.0 $ 15.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 21.9       $ 21.9