Note 20 - Condensed Parent Company Statements - Statements of Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
NET INCOME	$ 5,594,011	$ 5,716,767	$ 5,782,696
OTHER ITEMS OF COMPREHENSIVE INCOME (LOSS):
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes	(799,869)	(186,775)	3,300,555
Income tax expense related to other items of comprehensive income	(367,121)	(138,330)	1,208,565
Comprehensive income (loss) of Bank	4,968,726	5,481,232	7,840,523
Parent Company [Member]
NET INCOME	5,594,011	5,716,767	5,782,696
OTHER ITEMS OF COMPREHENSIVE INCOME (LOSS):
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes	2,695	(5,507)	5,718
Income tax expense related to other items of comprehensive income	(997)	2,038	2,117
Other comprehensive income (loss)	3,692	(7,545)	3,601
Comprehensive income (loss) of Bank	(628,977)	(227,990)	2,054,226
TOTAL COMPREHENSIVE INCOME	$ 4,968,726	$ 5,481,232	$ 7,840,523