Note 9 - Acquisition of Community State Bank and Common Stock Offering - Core Deposit (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016
Core Deposits [Member]
Balance at the beginning of the period	$ 6,352,653
Amortization expense	(60,834)
Balance at the end of the period	6,291,819
Gross carrying amount			$ 6,352,653
Accumulated amortization			(60,834)
Net book value	6,352,653		6,291,819
Balance at the beginning of the period	1,471,409
Amortization expense	(210,469)	$ (149,634)
Balance at the end of the period	7,613,593	1,521,287
Net book value	$ 7,613,593	$ 1,521,287	$ 7,613,593