5. Loans, Allowance for Loan Losses and Credit Quality (Details 5) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Group A	$ 585,806,499	$ 562,636,225
Group B	2,913,803	562,112
Group C	15,386,986	15,252,180
Total loans	604,107,288	578,450,517
Commercial and industrial
Group A	90,358,067	78,585,348
Group B	176,070	90,763
Group C	2,110,732	2,090,582
Total loans	92,644,869	80,766,693
Commercial Real Estate
Group A	238,563,693	226,785,919
Group B	2,737,733	246,357
Group C	8,298,295	8,285,872
Total loans	249,599,721	235,318,148
Municipal
Group A	51,935,005	47,067,023
Group B	0	0
Group C	0	0
Total loans	51,935,005	47,067,023
Residential real estate - 1st lien
Group A	156,675,620	161,293,233
Group B	0	224,992
Group C	4,380,608	4,146,950
Total loans	161,056,228	165,665,175
Residential real estate - Jr lien
Group A	43,564,376	43,817,872
Group B	0	0
Group C	597,351	727,115
Total loans	44,161,727	44,544,987
Consumer
Group A	4,709,738	5,086,830
Group B	0	0
Group C	0	1,661
Total loans	$ 4,709,738	$ 5,088,491