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Note 10 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 18, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock, Shares Authorized		37,000,000	37,000,000
Preferred Stock, Shares Authorized		3,000,000	3,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized		6,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period		10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized		8,118,003
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		1,105,266
Proceeds from Stock Options Exercised		$ 6.4	$ 6.2	$ 3.5
Common Stock, Dividends, Per Share, Declared		$ 0.64	$ 0.56	$ 0.5
Subsequent Event [Member] \| O 2025 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.2
Dividends Payable, Date to be Paid	Mar. 27, 2025
Dividends Payable, Date of Record	Mar. 13, 2025
Dividends Payable	$ 4.5
Stock Repurchase Program [Member] \| Common Stock [Member]
Treasury Stock, Shares, Acquired (in shares)		0
Stock Repurchase Program [Member] \| Common Stock [Member] \| Subsequent Event [Member]
Share Repurchase Program, Authorized, Amount	$ 75.0
Share-Based Payment Arrangement, Option [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period		4 years
Share-Based Payment Arrangement, Option [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period		5 years
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 4.9	$ 2.7	$ 2.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 18.3
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		2 years
Performance-based Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 1.2