Note 10 - Lease Commitments - Components of Total Lease Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amortization of lease right-of-use assets	$ 1,245,000	$ 961,000	$ 858,000
Short-term lease expense	110,000	38,000	46,000
Total	$ 1,355,000	$ 999,000	$ 904,000