Note 13 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Other real estate owned, gain (loss)			$ (0)	$ 47
Fair Value, Nonrecurring [Member]
Collateral dependent loans, fair value	$ 0		0		$ 0
Collateral dependent loans	0	$ 0	0	0
Other real estate owned, fair value	0		0		0
Other real estate owned, gain (loss)	0	$ 0	0	$ 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0		0		0
Other real estate owned, fair value	0		0		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	12,554		12,554		4,487
Other real estate owned, fair value	7,601		7,601		7,212
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	12,554		12,554		4,487
Other real estate owned, fair value	$ 7,601		$ 7,601		$ 7,212