Note 9 - Goodwill and Other Intangibles (Details) - Rollforward of Core Deposit Intangible - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Acquisitions		$ 0	$ 2,182,909
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount at December 31, 2013 (1)	[1]				$ 7,860
Accumulated amortization		(287,396)	(7,860)
Acquisitions		0	2,182,909	[2]
Net book value		$ 1,895,513	$ 2,182,909		$ 7,860

[1] CDI related to the acquisition of Green Street Financial Corp on November 30, 1999.

[2] CDI related to the acquisition of branch offices from Bank of America, N.A. on December 12, 2014.