Note 13 - Fair Value Measurements (Details Textual) $ in Thousands	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total	$ 4,918	$ 10,244
Minimum [Member]
Estimated Sales Cost Applied To Collateral	3.00%
Maximum [Member]
Estimated Sales Cost Applied To Collateral	6.00%
Measurement Input, Expected Term [Member] | Minimum [Member]
Warrants and Rights Outstanding, Measurement Input	1
Measurement Input, Expected Term [Member] | Maximum [Member]
Warrants and Rights Outstanding, Measurement Input	6
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]
Warrants and Rights Outstanding, Measurement Input	0.23
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]
Warrants and Rights Outstanding, Measurement Input	0.66
Measurement Input, Price Volatility [Member] | Minimum [Member]
Warrants and Rights Outstanding, Measurement Input	16.58
Measurement Input, Price Volatility [Member] | Maximum [Member]
Warrants and Rights Outstanding, Measurement Input	25.50