Note 11 - Fair Value of Financial Instruments - Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2023		Dec. 31, 2022
Impaired loans	$ 2,677	[1]	$ 281
Mortgage servicing rights	0		1,346
Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	[1]	0
Mortgage servicing rights	0		0
Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	[1]	0
Mortgage servicing rights	0		0
Fair Value, Inputs, Level 3 [Member]
Impaired loans	2,677	[1]	281
Mortgage servicing rights	$ 0		$ 1,346

[1] The Company adopted ASU No. 2016-13 as of January 1, 2023, which changes the methodology for impaired loans. The comparable period presents impaired loans under previously applicable GAAP.