Note 4 - Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
2023, Operating Lease	$ 1,221
2023, Financing Lease	60
2024, Operating Lease	1,136
2024, Financing Lease	0
2025, Operating Lease	1,151
2025, Financing Lease	0
2026, Operating Lease	1,076
2026, Financing Lease	0
2027, Operating Lease	1,099
2027, Financing Lease	0
2028 and thereafter, Operating Lease	1,289
2028 and thereafter, Financing Lease	0
Total operating lease payments	6,971
Total financing lease payments, finance leases	60
Less imputed interest, operating leases	(629)
Less imputed interest, financing leases	(2)
Present value, operating leases	6,342
Present value, financing leases	$ 58
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	5 years 11 months 15 days	6 years 10 months 28 days
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	6 months 29 days	1 year 6 months 29 days
Weighted Average Discount Rate - operating leases	3.20%	3.22%
Weighted Average Discount Rate - financing leases	5.00%	5.00%
Operating cash flows from operating leases	$ 309	$ 314
Operating cash flows from financing lease	1	1
Financing cash flows from financing lease	$ 5	$ 5