Loans and Allowance for Loan Losses (Details 4) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Commercial
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	$ 1,478,450	$ 1,586,510
Charge-offs	(93,953)	(60,042)
Recoveries	1,489	109,569
Provisions	114,069	(157,587)
Ending Balance	1,500,055	1,478,450
Individually evaluated for impairment	1,249,849	1,251,462
Collectively evaluated for impairment	250,206	226,988
Individually evaluated for impairment	1,381,598	1,392,037
Collectively evaluated for impairment	54,343,359	53,272,249
Commercial Real Estate
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	584,646	420,367
Charge-offs		(43,734)
Recoveries	3,000	13,228
Provisions	66,637	(194,785)
Ending Balance	654,283	584,646
Individually evaluated for impairment	257,904	169,243
Collectively evaluated for impairment	396,379	415,403
Individually evaluated for impairment	8,881,959	8,866,004
Collectively evaluated for impairment	98,299,846	101,985,943
Consumer Real Estate
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	890,728	450,338
Charge-offs		(56,487)
Recoveries		10,000
Provisions	(49,317)	486,877
Ending Balance	841,411	890,728
Individually evaluated for impairment	460,997	528,510
Collectively evaluated for impairment	380,414	362,218
Individually evaluated for impairment	1,190,291	1,190,795
Collectively evaluated for impairment	48,051,015	45,512,659
Consumer Other
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	102,953	91,402
Charge-offs		(12,025)
Recoveries	573	15,451
Provisions	(21,196)	8,125
Ending Balance	82,330	102,953
Individually evaluated for impairment	49,443	49,443
Collectively evaluated for impairment	32,887	53,510
Individually evaluated for impairment	49,443	49,443
Collectively evaluated for impairment	3,995,519	4,859,494
Unallocated
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	376,067	558,267
Charge-offs
Recoveries
Provisions	(35,193)	(182,200)
Ending Balance	340,874	376,067
Individually evaluated for impairment
Collectively evaluated for impairment	340,874	376,067
Individually evaluated for impairment		4,859,494
Collectively evaluated for impairment
Total
Activity in the allowance for loan losses by portfolio segment
Beginning Balance	3,432,844	3,106,884
Charge-offs	(93,953)	(172,288)
Recoveries	5,062	148,248
Provisions	75,000	350,000
Ending Balance	3,418,953	3,432,844
Individually evaluated for impairment	2,018,193	1,998,658
Collectively evaluated for impairment	1,400,760	1,434,186
Individually evaluated for impairment	11,503,291	11,498,279
Collectively evaluated for impairment	$ 204,689,739	$ 205,630,345