Note 9 - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Other Real Estate (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other real estate	$ 1,010	$ 1,891
Fair Value, Inputs, Level 3 [Member]
Other real estate	$ 1,010	$ 1,891