Note 17 - Commitments and Contingencies - Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fixed rate	$ 4,542	$ 4,007
Adjustable rate	10,661	3,854
Commitments to extend credit	105,318	73,428
Unused Lines of Credit On Credit Cards [Member]
Commitments to extend credit	5,463	4,429
Undisbursed Commercial and Personal Lines of Credit [Member]
Commitments to extend credit	32,125	29,359
Undisbursed Portion of Construction Loans in Process [Member]
Commitments to extend credit	19,037	4,869
Undisbursed Portion of Home Equity Lines of Credit [Member]
Commitments to extend credit	$ 33,490	$ 26,910