5. Impaired loans by segment (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Recorde Investment allowance recorded	$ 4,192,714	$ 6,568,494	$ 7,470,370
Unpaid Principal Balance allowance recorded	4,969,054	7,400,343	8,497,472
Related Allowance recorded	166,000	499,200	458,500
Average Recorded Investment Allowance recorded	6,245,100	5,114,495	5,585,670
Interet Income Recognized allownce recorded	0	0	0
Commercial and Industrial
Recorded Investment With no related allowance recorded	446,484	397,993	380,624
Recorded Investment With an allowance recorded	0	443,039	619,496
Recorde Investment allowance recorded	446,484	841,032	1,000,120
Unpaid Principal Balance With no related allowance recorded	478,798	400,678	391,800
Unpaid Principal Balance With an allowance recorded	0	443,887	637,729
Unpaid Principal Balance allowance recorded	478,798	844,565	1,029,529
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	0	42,100	70,600
Related Allowance recorded	0	42,100	70,600
Average Recorded Investment With no related allowance recorded	562,425	320,498	332,523
Average Recorded Investment With an allowance recorded	290,929	142,281	237,724
Average Recorded Investment Allowance recorded	853,354	462,779	570,247
Interest Income Recognized With no related allowance recorded	0	0	0
Interest Income Recognized With an allowance recorded	0	0	0
Interet Income Recognized allownce recorded	0	0	0
Commercial Real Estate
Recorded Investment With no related allowance recorded	1,996,452	1,320,096	2,041,101
Recorded Investment With an allowance recorded	190,608	1,514,488	1,628,159
Recorde Investment allowance recorded	2,187,060	2,834,584	3,669,260
Unpaid Principal Balance With no related allowance recorded	2,426,167	1,350,647	2,246,905
Unpaid Principal Balance With an allowance recorded	192,108	1,517,237	1,653,646
Unpaid Principal Balance allowance recorded	2,618,275	2,867,884	3,900,551
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	8,900	104,500	57,500
Related Allowance recorded	8,900	104,500	57,500
Average Recorded Investment With no related allowance recorded	2,083,657	690,234	960,407
Average Recorded Investment With an allowance recorded	1,151,053	1,003,954	1,128,795
Average Recorded Investment Allowance recorded	3,234,710	1,694,188	2,089,202
Interest Income Recognized With no related allowance recorded	0	0	0
Interest Income Recognized With an allowance recorded	0	0	0
Interet Income Recognized allownce recorded	0	0	0
Residential real estate - 1st lien
Recorded Investment With no related allowance recorded	900,217		1,000,819
Recorded Investment With an allowance recorded	361,055		1,365,507
Recorde Investment allowance recorded	1,261,272		2,366,326
Unpaid Principal Balance With no related allowance recorded	1,149,862		1,191,437
Unpaid Principal Balance With an allowance recorded	402,647		1,869,338
Unpaid Principal Balance allowance recorded	1,552,509		3,060,775
Related Allowance With no ralated allowance recorded	0		0
Related Allowance With an allowance recorded	110,700		283,200
Related Allowance recorded	110,700		283,200
Average Recorded Investment With no related allowance recorded	860,886		1,210,137
Average Recorded Investment With an allowance recorded	961,084		1,629,151
Average Recorded Investment Allowance recorded	1,821,970		2,839,288
Interest Income Recognized With no related allowance recorded	0		0
Interest Income Recognized With an allowance recorded	0		0
Residential Real Estate
Recorded Investment With no related allowance recorded		1,079,821
Recorded Investment With an allowance recorded		1,813,057
Recorde Investment allowance recorded		2,892,878
Unpaid Principal Balance With no related allowance recorded		1,370,967
Unpaid Principal Balance With an allowance recorded		2,316,927
Unpaid Principal Balance allowance recorded		3,687,894
Related Allowance With no ralated allowance recorded		0
Related Allowance With an allowance recorded		352,600
Related Allowance recorded		352,600
Average Recorded Investment With no related allowance recorded		1,262,466
Average Recorded Investment With an allowance recorded		1,695,062
Average Recorded Investment Allowance recorded		2,957,528
Interest Income Recognized With no related allowance recorded		0
Interest Income Recognized With an allowance recorded		0
Interet Income Recognized allownce recorded		0
Residential real estate - Jr lien
Recorded Investment With no related allowance recorded	0		125,786
Recorded Investment With an allowance recorded	297,898		308,878
Recorde Investment allowance recorded	297,898		434,664
Unpaid Principal Balance With no related allowance recorded	0		185,142
Unpaid Principal Balance With an allowance recorded	319,472		321,475
Unpaid Principal Balance allowance recorded	319,472		506,617
Related Allowance With no ralated allowance recorded	0		0
Related Allowance With an allowance recorded	46,400		47,200
Related Allowance recorded	46,400		47,200
Average Recorded Investment With no related allowance recorded	39,329		25,157
Average Recorded Investment With an allowance recorded	295,737		61,776
Average Recorded Investment Allowance recorded	335,066		86,933
Interest Income Recognized With no related allowance recorded	0		0
Interest Income Recognized With an allowance recorded	0		0
Interet Income Recognized allownce recorded	$ 0		$ 0