Loans and Allowance for Loan Losses (Details 2) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total	$ (5,669,215)	$ (6,141,281)	$ (7,400,000)
Commercial Real Estate Mortgage [Member]
Total	(2,944,000)	2,549,000	3,557,000
Consumer Real Estate Mortgage [Member]
Total	1,482,000	1,528,000	2,518,000
Construction and Land Development [Member]
Total	682,000	1,241,000	827,000
Commercial and Industrial Loans [Member]
Total	551,000	809,000	482,000
Consumer and Other Loans [Member]
Total	10,000	14,000	16,000
Performing Loans [Member]
Total	2,091,000	2,095,000
Performing Loans [Member] | Commercial Real Estate Mortgage [Member]
Total	872,000	319,000
Performing Loans [Member] | Consumer Real Estate Mortgage [Member]
Total	912,000	952,000
Performing Loans [Member] | Construction and Land Development [Member]
Total	222,000	781,000
Performing Loans [Member] | Commercial and Industrial Loans [Member]
Total	75,000	29,000
Performing Loans [Member] | Consumer and Other Loans [Member]
Total	10,000	14,000
Impaired Loans [Member]
Total	3,578,000	4,046,000
Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Total	2,072,000	2,230,000
Impaired Loans [Member] | Consumer Real Estate Mortgage [Member]
Total	570,000	576,000
Impaired Loans [Member] | Construction and Land Development [Member]
Total	460,000	460,000
Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Total	476,000	780,000
Impaired Loans [Member] | Consumer and Other Loans [Member]
Total	$ 0	$ 0