Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value	$ 39,692,142	$ 47,314,541
Securities, continuous unrealized loss position, less than 12 months, unrealized losses	(397,611)	(727,804)
Securities, continuous unrealized loss position, 12 months or more, fair value	21,580,162	20,808,939
Securities, continuous unrealized loss position, 12 months or more, unrealized losses	(529,051)	(684,021)
Securities, continuous unrealized loss position, fair value	61,272,304	68,123,480
Securities, continuous unrealized loss position, unrealized losses	(926,662)	(1,411,825)
Equity Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value	0	0
Securities, continuous unrealized loss position, less than 12 months, unrealized losses	0	0
Securities, continuous unrealized loss position, 12 months or more, fair value	31,234	35,151
Securities, continuous unrealized loss position, 12 months or more, unrealized losses	(16,693)	(12,776)
Securities, continuous unrealized loss position, fair value	31,234	35,151
Securities, continuous unrealized loss position, unrealized losses	(16,693)	(12,776)
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value	10,001,797	6,167,019
Securities, continuous unrealized loss position, less than 12 months, unrealized losses	(103,629)	(70,266)
Securities, continuous unrealized loss position, 12 months or more, fair value	2,060,307	715,410
Securities, continuous unrealized loss position, 12 months or more, unrealized losses	(44,675)	(15,542)
Securities, continuous unrealized loss position, fair value	12,062,104	6,882,429
Securities, continuous unrealized loss position, unrealized losses	(148,304)	(85,808)
Corporate Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value	1,599,480	1,675,500
Securities, continuous unrealized loss position, less than 12 months, unrealized losses	(159,529)	(79,708)
Securities, continuous unrealized loss position, 12 months or more, fair value	1,967,500	2,138,200
Securities, continuous unrealized loss position, 12 months or more, unrealized losses	(248,736)	(72,311)
Securities, continuous unrealized loss position, fair value	3,566,980	3,813,700
Securities, continuous unrealized loss position, unrealized losses	(408,265)	(152,019)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value	28,090,865	33,072,102
Securities, continuous unrealized loss position, less than 12 months, unrealized losses	(134,453)	(493,865)
Securities, continuous unrealized loss position, 12 months or more, fair value	17,521,121	15,923,314
Securities, continuous unrealized loss position, 12 months or more, unrealized losses	(218,947)	(530,256)
Securities, continuous unrealized loss position, fair value	45,611,986	48,995,416
Securities, continuous unrealized loss position, unrealized losses	$ (353,400)	(1,024,121)
US Government Agencies Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
Securities, continuous unrealized loss position, less than 12 months, fair value		6,399,920
Securities, continuous unrealized loss position, less than 12 months, unrealized losses		(83,965)
Securities, continuous unrealized loss position, 12 months or more, fair value		1,996,864
Securities, continuous unrealized loss position, 12 months or more, unrealized losses		(53,136)
Securities, continuous unrealized loss position, fair value		8,396,784
Securities, continuous unrealized loss position, unrealized losses		$ (137,101)