Note 1 - Summary of Significant Accounting Policies - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred compensation plan assets	$ 107,096	$ 92,586
Deferred compensation plan liabilities	107,661	95,976
Other Long-term Assets [Member]
Deferred compensation plan assets	107,096	92,586
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	3,707	2,323
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	103,954	93,653
Cash Surrender Value [Member]
Deferred compensation plan assets	31,612	27,249
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 75,484	$ 65,337