Note 5 - Fair Value Measurements - Level 3 Fair Value Measurements (Details)		Sep. 30, 2023		Dec. 31, 2022
OREO				34.72
Measurement Input, Cost to Sell [Member] | Valuation, Market Approach [Member]
OREO		0.07	[1]	0.07
Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member]
OREO	[1]	0.3472

[1] As of September 30, 2022 and December 31, 2021, OREO was composed of a single property.