Note 9 - Fair Value Measurements and Disclosures - Change in Fair Value of Other Real Estate (Details) - Real Estate Acquired in Satisfaction of Debt [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Balance, beginning of period	$ 1,891	$ 3,475
Loans transferred to ORE		14
Sales	(881)	(1,299)
Writedowns		(299)
Balance, end of period	$ 1,010	$ 1,891