Note 3 - Securities (Detail) - Gross Unrealized Losses and Fair Value of Investments (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Securities Less than 12 Months Fair Value	$ 51,748,236	$ 29,543,265
Securities Less than 12 Months Unrealized Losses	(571,310)	(514,025)
Securities 12 Months or More Fair Value	1,106,626	578,230
Securities 12 Months or More Unrealized Losses	(64,850)	(39,742)
Securities Total Fair Value	52,854,862	30,121,495	52,854,862	30,121,495
Securities Total Unrealized Losses	(636,160)	(553,767)
Equity Securities [Member]
Securities Less than 12 Months Fair Value	0	0
Securities Less than 12 Months Unrealized Losses	0	0
Securities 12 Months or More Fair Value	45,613	39,930
Securities 12 Months or More Unrealized Losses	(25,921)	(31,604)
Securities Total Fair Value	45,613	39,930
Securities Total Unrealized Losses	(25,921)	(31,604)
US Government Agencies Debt Securities [Member]
Securities Less than 12 Months Fair Value	24,587,030	7,298,687
Securities Less than 12 Months Unrealized Losses	(138,607)	(39,706)
Securities 12 Months or More Fair Value	0	0
Securities 12 Months or More Unrealized Losses	0	0
Securities Total Fair Value	24,587,030	7,298,687
Securities Total Unrealized Losses	(138,607)	(39,706)
US States and Political Subdivisions Debt Securities [Member]
Securities Less than 12 Months Fair Value	3,820,175	2,648,047
Securities Less than 12 Months Unrealized Losses	(60,458)	(76,318)
Securities 12 Months or More Fair Value	1,061,013	538,300
Securities 12 Months or More Unrealized Losses	(38,929)	(8,138)
Securities Total Fair Value	4,881,188	3,186,347
Securities Total Unrealized Losses	(99,387)	(84,456)
Corporate Bonds [Member]
Securities Less than 12 Months Fair Value	980,290
Securities Less than 12 Months Unrealized Losses	(7,524)
Securities 12 Months or More Fair Value	0
Securities 12 Months or More Unrealized Losses	0
Securities Total Fair Value	980,290
Securities Total Unrealized Losses	(7,524)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities Less than 12 Months Fair Value	22,360,741	19,596,531
Securities Less than 12 Months Unrealized Losses	(364,721)	(398,001)
Securities 12 Months or More Fair Value	0	0
Securities 12 Months or More Unrealized Losses	0	0
Securities Total Fair Value	22,360,741	19,596,531
Securities Total Unrealized Losses	$ (364,721)	$ (398,001)