4. Investment Securities (Details 1) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Available for sale Securities
Amortized Cost
Due in one year or less, Amortized Cost	$ 8,184,431	$ 4,088,947	$ 7,020,449
Due from one to five years, Amortized Cost	35,339,343	36,536,874	64,716,734
Due from five to ten years, Amortized Cost	2,250,000		1,000,000
Amortization Cost of Debt	45,773,774	40,625,821	72,737,183
Fair Value
Due in one year or less, fair value	8,205,591	4,104,324	7,050,344
Due from one to five years, fair value	35,565,694	36,781,735	64,896,400
Due from five to ten years, fair value	2,239,028		1,005,134
Fair value of debt	46,010,313	40,886,059	72,951,878
Held to maturity Securities
Amortized Cost
Due in one year or less, Amortized Cost	33,501,248	32,741,241	24,784,042
Due from one to five years, Amortized Cost	3,641,743	3,849,709	4,236,531
Due from five to ten years, Amortized Cost	1,898,484	1,916,266	804,472
Due after ten years, Amortized Cost	3,339,493	3,358,339	3,737,561
Amortization Cost of Debt	42,380,968	41,865,555	33,562,606
Fair Value
Due in one year or less, fair value	33,501,000	32,741,000	24,784,000
Due from one to five years, fair value	3,730,000	3,956,000	4,388,000
Due from five to ten years, fair value	1,986,000	2,023,000	956,000
Due after ten years, fair value	3,516,000	3,571,000	4,040,000
Fair value of debt	$ 42,733,000	$ 42,291,000	$ 34,168,000