Note 11 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Deferred compensation plan assets	$ 97,831	$ 92,586
Deferred compensation plan liabilities	98,086	95,976
Other Long-term Assets [Member]
Deferred compensation plan assets	97,831	92,586
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	3,480	2,323
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	94,606	93,653
Cash Surrender Value [Member]
Deferred compensation plan assets	29,110	27,249
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 68,721	$ 65,337