Note 6 - Operating Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Operating Lease, Right-of-Use Asset	$ 3,320	$ 3,552
Operating Lease, Liability, Total	$ 3,651
Operating Lease, Weighted Average Discount Rate, Percent	3.90%
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 9 months 18 days
Operating Lease, Expense	$ 269