Note 14 - Fair Value Measurements - Schedule of Assets on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] $ in Thousands	Dec. 31, 2020 USD ($)
Real estate owned and repossessed assets	$ 2
Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member]
Real estate owned and repossessed assets	$ 2
Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member] | Minimum [Member]
Real estate owned and repossessed assets	0
Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member] | Maximum [Member]
Real estate owned and repossessed assets	10
Measurement Input, Discount Rate [Member] | Valuation, Market Approach [Member] | Weighted Average [Member]
Real estate owned and repossessed assets	5