Loans and Allowance for Loan Losses, Allowance for credit losses (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			$ 672,261	$ 983,178	$ 983,178
Loans charged off			(226,438)	(23,604)	(1,484,260)
Recoveries			19,985	42,360	46,043
Provision charged to operations	105,000	803,500	297,500	948,900	1,127,300
Ending balance	763,308	1,950,834	763,308	1,950,834	672,261
Individually evaluated for impairment [Abstract]
Balance in allowance	0	1,277,672	0	1,277,672	0
Related loan balance	3,379,021	4,757,320	3,379,021	4,757,320	4,026,437
Collectively evaluated for impairment [Abstract]
Balance in allowance	763,308	673,162	763,308	673,162	672,261
Related loan balance	233,441,335	236,863,443	233,441,335	236,863,443	224,179,963
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Net loans charged off (recovered)			206,453	(18,756)	1,438,217
Balance at end of period	763,308	1,950,834	763,308	1,950,834	672,261
Gross loans outstanding at the end of the period	236,820,356	241,620,763	236,820,356	241,620,763	228,206,400
Allowance for loan losses to gross loans outstanding at the end of the period (in hundredths)	0.32%	0.81%	0.32%	0.81%	0.29%
Average gross loans outstanding during the period			232,737,626	246,535,270	237,757,026
Annualized net charge-offs as a percentage of average gross loans outstanding during the period (in hundredths)			0.18%	(0.02%)	0.60%
Real estate mortgages Construction and Land [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			160,392	235,437	235,437
Loans charged off			(45,081)	(11,553)	(227,197)
Recoveries			0	39,072	39,072
Provision charged to operations			51,570	197,989	113,080
Ending balance	166,881	460,945	166,881	460,945	160,392
Individually evaluated for impairment [Abstract]
Balance in allowance	0	193,672	0	193,672	0
Related loan balance	922,369	1,421,290	922,369	1,421,290	1,220,789
Collectively evaluated for impairment [Abstract]
Balance in allowance	166,881	267,273	166,881	267,273	160,392
Related loan balance	13,336,112	13,217,717	13,336,112	13,217,717	11,941,671
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	166,881	460,945	166,881	460,945	160,392
Real estate mortgages Residential [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			42,064	50,602	50,602
Loans charged off			(172,884)	0	(353,238)
Recoveries			15,000	300	300
Provision charged to operations			227,150	254,000	344,400
Ending balance	111,330	304,902	111,330	304,902	42,064
Individually evaluated for impairment [Abstract]
Balance in allowance	0	234,000	0	234,000	0
Related loan balance	860,264	786,510	860,264	786,510	1,188,260
Collectively evaluated for impairment [Abstract]
Balance in allowance	111,330	70,902	111,330	70,902	42,064
Related loan balance	83,907,085	91,862,588	83,907,085	91,862,588	86,599,462
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	111,330	304,902	111,330	304,902	42,064
Real estate mortgages Commercial [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			193,570	356,993	356,993
Loans charged off			0	0	(865,683)
Recoveries			0	0	0
Provision charged to operations			30,220	500,000	702,260
Ending balance	223,790	856,993	223,790	856,993	193,570
Individually evaluated for impairment [Abstract]
Balance in allowance	0	850,000	0	850,000	0
Related loan balance	1,596,388	2,549,520	1,596,388	2,549,520	1,617,388
Collectively evaluated for impairment [Abstract]
Balance in allowance	223,790	6,993	223,790	6,993	193,570
Related loan balance	120,160,040	115,044,495	120,160,040	115,044,495	111,393,555
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	223,790	856,993	223,790	856,993	193,570
Commercial [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			197,353	194,946	194,946
Loans charged off			(363)	(2,946)	(18,492)
Recoveries			3	400	410
Provision charged to operations			(18,702)	53,729	20,489
Ending balance	178,291	246,129	178,291	246,129	197,353
Individually evaluated for impairment [Abstract]
Balance in allowance	0	0	0	0	0
Related loan balance	0	0	0	0	0
Collectively evaluated for impairment [Abstract]
Balance in allowance	178,291	246,129	178,291	246,129	197,353
Related loan balance	14,308,510	15,118,015	14,308,510	15,118,015	12,507,978
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	178,291	246,129	178,291	246,129	197,353
Consumer [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			60,487	119,228	119,228
Loans charged off			(8,110)	(9,105)	(19,650)
Recoveries			4,982	2,588	6,261
Provision charged to operations			(7,597)	(58,872)	(45,352)
Ending balance	49,762	53,839	49,762	53,839	60,487
Individually evaluated for impairment [Abstract]
Balance in allowance	0	0	0	0	0
Related loan balance	0	0	0	0	0
Collectively evaluated for impairment [Abstract]
Balance in allowance	49,762	53,839	49,762	53,839	60,487
Related loan balance	1,729,588	1,620,628	1,729,588	1,620,628	1,737,297
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	49,762	53,839	49,762	53,839	60,487
Unallocated [Member]
Allowance for loan losses by type of loan [Roll Forward]
Beginning balance			18,395	25,972	25,972
Loans charged off			0	0	0
Recoveries			0	0	0
Provision charged to operations			14,859	2,054	(7,577)
Ending balance	33,254	28,026	33,254	28,026	18,395
Collectively evaluated for impairment [Abstract]
Balance in allowance	33,254	28,026	33,254	28,026	18,395
Net charged-off loans and the balance in the allowance to gross loans and average loans [Abstract]
Balance at end of period	$ 33,254	$ 28,026	$ 33,254	$ 28,026	$ 18,395