Note 1 - Nature of Operations and Basis of Presentation (Details Textual)	May 01, 2020 USD ($)	May 06, 2020 USD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)
Financing Receivable, Number of Payment Deferrals				76
Financing Receivable, Principal and Interest Deferred Payments				$ 15,100,000
Subsequent Event [Member]
Financing Receivable, Number of Payment Deferrals		391	391
Financing Receivable, Principal and Interest Deferred Payments		$ 78,700,000	$ 78,700,000
Number of Paycheck Protection Program Loans Originated	470
Financing Receivable, Paycheck Protection Program Loans Originated	$ 45,300,000