Note 12 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deferred compensation plan assets	$ 83,050	$ 78,381
Deferred compensation plan liabilities	85,619	81,287
Other Long-term Assets [Member]
Deferred compensation plan assets	83,050	78,381
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	7,534	384
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	78,085	80,903
Cash Surrender Value [Member]
Deferred compensation plan assets	25,677	23,545
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 57,373	$ 54,836