Note 12 - Income Taxes - (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2015
Operating Loss Carryforwards	$ 201,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 310,000	$ 345,000
Operating Loss Carryforwards, Expiration Year	2033
American Gateway Financial Corporation [Member]
Operating Loss Carryforwards			$ 287,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax			$ 984,000