Note 5 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Unused Commitments to Extend Credit	$ 104,500	$ 111,400
Construction Loan Payable [Member]
Unused Commitments to Extend Credit	7,100
Standby Letters of Credit [Member]
Unused Commitments to Extend Credit	$ 126	$ 126