Note 9 - Acquisition of Community State Bank and Common Stock Offering - Changes in Accretable Yield (Details) - Community State Bank [Member]	9 Months Ended
	Sep. 30, 2016 USD ($)
Receivables Acquired with Deteriorated Credit Quality [Member]
Balance at the beginning of the period	$ (277,579)
Accretion recognized	29,317
Balance at the end of the period	(248,262)
Performing Financial Instruments [Member]
Balance at the beginning of the period	(11,916,009)
Accretion recognized	366,293
Balance at the end of the period	(11,549,716)
Balance at the beginning of the period	(12,193,588)
Accretion recognized	395,610
Balance at the end of the period	$ (11,797,978)