5. Loans, Allowance for Loan Losses and Credit Quality (Details 3) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Recorded Investment allowance recorded	$ 4,208,096	$ 7,225,233	$ 4,149,346
Unpaid Principal Balance allowance recorded	4,990,220	8,296,440	4,912,247
Related Allowance recorded	268,200	383,500	174,000
Average Recorded Investment Allowance recorded	4,178,721	7,347,802	5,825,949
Commercial and industrial
Recorded Investment With no related allowance recorded	323,486	437,245	435,165
Recorded Investment With an allowance recorded	0	544,218	0
Recorded Investment allowance recorded	323,486	981,463	435,165
Unpaid Principal Balance With no related allowance recorded	360,385	459,130	473,664
Unpaid Principal Balance With an allowance recorded	0	562,609	0
Unpaid Principal Balance allowance recorded	360,385	1,021,739	473,664
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	0	56,500	0
Related Allowance recorded	0	56,500	0
Average Recorded Investment With no related allowance recorded	379,326	408,934	536,973
Average Recorded Investment With an allowance recorded	0	581,857	232,743
Average Recorded Investment Allowance recorded	379,326	990,791	769,716
Commercial Real Estate
Recorded Investment With no related allowance recorded	1,749,415	1,989,517	1,762,615
Recorded Investment With an allowance recorded	304,850	1,633,788	0
Recorded Investment allowance recorded	2,054,265	3,623,305	1,762,615
Unpaid Principal Balance With no related allowance recorded	2,123,371	2,241,646	2,123,371
Unpaid Principal Balance With an allowance recorded	304,850	1,658,905	0
Unpaid Principal Balance allowance recorded	2,428,221	3,900,551	2,123,371
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	104,500	36,200	0
Related Allowance recorded	104,500	36,200	0
Average Recorded Investment With no related allowance recorded	1,756,015	2,015,309	2,019,449
Average Recorded Investment With an allowance recorded	152,425	1,630,974	920,842
Average Recorded Investment Allowance recorded	1,908,440	3,646,283	2,940,291
Residential real estate - 1st lien
Recorded Investment With no related allowance recorded	1,010,777	841,086	1,024,598
Recorded Investment With an allowance recorded	479,228	1,473,473	617,362
Recorded Investment allowance recorded	1,490,005	2,314,559	1,641,960
Unpaid Principal Balance With no related allowance recorded	1,230,873	1,069,606	1,250,224
Unpaid Principal Balance With an allowance recorded	540,698	1,983,044	669,288
Unpaid Principal Balance allowance recorded	1,771,571	3,052,650	1,919,512
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	116,300	255,300	134,800
Related Allowance recorded	116,300	255,300	134,800
Average Recorded Investment With no related allowance recorded	1,017,687	920,953	893,629
Average Recorded Investment With an allowance recorded	548,295	1,419,490	892,339
Average Recorded Investment Allowance recorded	1,565,982	2,340,443	1,785,968
Residential real estate - Jr lien
Recorded Investment With no related allowance recorded	15,694	0	15,694
Recorded Investment With an allowance recorded	324,646	305,906	293,912
Recorded Investment allowance recorded	340,340	305,906	309,606
Unpaid Principal Balance With no related allowance recorded	77,545	0	76,680
Unpaid Principal Balance With an allowance recorded	352,498	321,500	319,020
Unpaid Principal Balance allowance recorded	430,043	321,500	395,700
Related Allowance With no ralated allowance recorded	0	0	0
Related Allowance With an allowance recorded	47,400	35,500	39,200
Related Allowance recorded	47,400	35,500	39,200
Average Recorded Investment With no related allowance recorded	15,694	62,893	34,602
Average Recorded Investment With an allowance recorded	309,279	307,392	295,372
Average Recorded Investment Allowance recorded	$ 324,973	$ 370,285	$ 329,974