Note 1 - Basis of Presentation (Details Textual)		3 Months Ended
	May 05, 2020 USD ($) loan	Mar. 31, 2020
Paycheck Protection Program [Member] | Subsequent Event [Member]
Basis Of Presentation [Line Items]
Number of loans closed | loan	412
Loans recovered amount | $	$ 71,941,000
Commercial Portfolio Segment [Member]
Basis Of Presentation [Line Items]
Percentage of financing receivable modifications due to pandemic		18.00%
Retail Portfolio Segment [Member]
Basis Of Presentation [Line Items]
Percentage of financing receivable modifications due to pandemic		3.00%