Note 12 - Fair Value Measurements - Assets Measured on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Individually assessed loans, net of valuation allowance	$ 1,572	$ 7
Other real estate owned, net	27	27
Fair Value, Inputs, Level 1 [Member]
Individually assessed loans, net of valuation allowance	0	0
Other real estate owned, net		0
Fair Value, Inputs, Level 2 [Member]
Individually assessed loans, net of valuation allowance	0	0
Other real estate owned, net	0	0
Fair Value, Inputs, Level 3 [Member]
Individually assessed loans, net of valuation allowance	1,572	7
Other real estate owned, net	$ 27	$ 27