Note 13 - Income Taxes - (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2015
Operating Loss Carryforwards, Total	$ 144,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax		$ 193,000
Operating Loss Carryforwards, Expiration Year	2033
American Gateway Financial Corporation [Member]
Operating Loss Carryforwards, Total			$ 287,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax			$ 984,000