Note 3 - Loans Receivable (Details Textual) - SBA PPP Loans [Member] - SBA CARES Act Paycheck Protection Program [Member] - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, before Allowance for Credit Loss, Total	$ 40.8	$ 52.5
Loans and Leases Receivable, Deferred Income, Total	$ 3.0	$ 1.4