Note 11 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Deferred compensation plan assets	$ 101,905	$ 92,586
Deferred compensation plan liabilities	102,582	95,976
Other Long-term Assets [Member]
Deferred compensation plan assets	101,905	92,586
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	3,656	2,323
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	98,926	93,653
Cash Surrender Value [Member]
Deferred compensation plan assets	30,911	27,249
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 70,994	$ 65,337