Note 5 - Fair Value Measurements - Level 3 Fair Value Measurements (Details) - Valuation, Market Approach [Member]		Jun. 30, 2023		Dec. 31, 2022
Measurement Input, Cost to Sell [Member]
OREO				0.0700
Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
OREO	[1]	0.0700
Measurement Input, Discount Rate [Member] | Weighted Average [Member]
OREO		0.3472	[1]	0.3472

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