Note 9 - Leases - Lease Expense and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finance lease amortization of right-of-use assets	$ 121	$ 143	$ 185
Interest on finance lease liabilities	11	19	25
Finance lease expense	132	162	210
Operating lease expense	2,839	2,468	2,383
Short-term lease expense	17	2	0
Variable lease expense	413	319	264
Total lease expense	$ 3,401	$ 2,951	$ 2,857
Operating leases (Year)	14 years 9 months 18 days	15 years 3 months 18 days
Financing leases (Year)		2 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	3.60%	4.10%
Financing leases	0.00%	4.90%
Right-of-use assets obtained in exchange for operating lease liabilities	$ 2,471	$ 2,392
Operating cash flows from financing leases	$ 121	$ 136