Note 6 - Fair Value Measurements - Level 3 Fair Value Measurements (Details)		Mar. 31, 2022	Dec. 31, 2021
Measurement Input, Cost to Sell [Member] | Valuation, Market Approach [Member]
OREO	[1]	0.0620	0.0620

[1] As of March 31, 2022 and December 31, 2021, OREO was composed of a single property.