Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Unallocated ESOP Shares [Member]
Allocation of ESOP shares (in shares)	18,779	5,087
Common Stock [Member]
Offering expenses	$ 1,627,317