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Note 2 - Earnings Per Common Share (Details Textual) - shares
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Share-Based Payment Arrangement, Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 605,371 524,900
Unvested Performance Unit Awards [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 114,276 82,788