Note 9 - Employee Benefits - Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Health benefits, including premiums	$ 18,483	$ 14,607
401(k) matching	2,910	2,549
Deferred bonus plan	687	809
Total	$ 22,080	$ 17,965