Note 1 - Organization and Operations (Details Textual) - USD ($)			12 Months Ended
	Oct. 13, 2017	Apr. 05, 2010	Dec. 31, 2018	Dec. 31, 2017
Stock Issued During Period, Shares, New Issues	1,189,041	2,464,274
Share Price		$ 10
Proceeds from Issuance Initial Public Offering		$ 24,643,000
Shares of Common Stock Received by Existing Stockholders for Each Share of Common Stock Owned Immediately Prior to Completion of The Transaction		3.8
Employee Stock Ownership Plan ESOP Percent of Shares Authorized to be Purchased		8.00%
Stock Issued During Period, Shares, Employee Stock Ownership Plan		197,142
Stock Issued During Period, Value, Employee Stock Ownership Plan		$ 1,971,000
Proceeds from Issuance of Common Stock	$ 20,157,000			$ 20,157,000