Note 7 - Intangible Assets and Loan Servicing (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets and Loan Servicing Details [Line Items]
Servicing asset loans unpaid principal balance	$ 87,518	$ 73,108
Servicing asset at fair value, amount	$ 568	$ 551
Minimum [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate	12.00%	12.00%
Maximum [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate	12.50%	12.50%
Other Assets [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing asset at fair value, amount	$ 568	$ 551