Note 17 - Condensed Parent Only Financial Statements - Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 1,261,098	$ 770,962
Adjustments to reconcile net income to net cash provided by operating activities:
Net cash provided by operating activities	2,362,650	2,560,833
Cash Flows from Investing Activities
Net cash (used in) provided by investing activities	(18,964,991)	8,097,910
Cash Flows from Financing Activities
Proceeds from stock offering including shares purchased by ESOP, net of expenses	22,337,869
Proceeds from stock options exercised	127,926
Loan to ESOP to purchase Company stock in stock offering	(1,907,160)
Net cash provided by (used in) financing activities	15,413,271	(8,716,259)
Net increase (decrease) in cash and cash equivalents	(1,189,070)	1,942,484
Cash and cash equivalents:
Beginning of period	7,135,719	5,193,235
End of period	5,946,649	7,135,719
Supplemental Schedule of Noncash Investing and Financing Activities
Increase (decrease) in ESOP put option liability	431,086	(48,187)
Parent Company [Member]
Cash Flows from Operating Activities
Net income	1,261,098	770,962
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed net income of subsidiary	(1,316,346)	(830,134)
Net cash provided by operating activities	(55,248)	(59,172)
Cash Flows from Investing Activities
Payments received on ESOP notes receivable	207,165	57,198
Net cash (used in) provided by investing activities	207,165	57,198
Cash Flows from Financing Activities
Proceeds from stock offering including shares purchased by ESOP, net of expenses	22,337,869
Proceeds from stock offering including shares purchased by ESOP, net of expenses	(11,106,092)
Proceeds from stock options exercised	127,926
Loan to ESOP to purchase Company stock in stock offering	(1,907,160)
Net cash provided by (used in) financing activities	9,452,543
Net increase (decrease) in cash and cash equivalents	9,604,460	(1,974)
Cash and cash equivalents:
Beginning of period	325,764	327,738
End of period	9,930,224	325,764
Supplemental Schedule of Noncash Investing and Financing Activities
Increase (decrease) in ESOP put option liability	$ 431,086	$ (48,187)