Note 14 - Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Impaired loans	$ 3,195	$ 5,511
Real estate owned and repossessed assets		2
Assets, Fair Value Disclosure		5,513
Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Real estate owned and repossessed assets		0
Assets, Fair Value Disclosure		0
Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Real estate owned and repossessed assets		0
Assets, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member]
Impaired loans	$ 3,195	5,511
Real estate owned and repossessed assets		2
Assets, Fair Value Disclosure		$ 5,513