5. Loans, Allowance for Loan Losses and Credit Quality (Details 3) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Allowance for loan losses, beginning balance	$ 5,723,753	$ 5,413,023	$ 5,602,541	$ 5,438,099	$ 5,438,099
Charge-offs	(267,333)	(50,092)	(541,757)	(481,832)	(742,020)
Recoveries	14,723	68,296	56,190	114,960	126,462
Provisions (credit)	412,499	210,000	766,668	570,000	780,000
Allowance for loan losses, ending balance	5,883,642	5,641,227	5,883,642	5,641,227	5,602,541
Allowance for loan losses evaluated for impairment, individually	205,180		205,180		114,726
Allowance for loan losses evaluated for impairment, collectively	5,678,462		5,678,462		5,487,815
Allowance for loan losses	5,883,642		5,883,642		5,602,541
Loans evaluated for impairment, individually	7,729,644		7,729,644		6,519,121
Loans evaluated for impairment, collectively	596,377,644		596,377,644		571,931,396
Total loans	604,107,288		604,107,288		578,450,517
Commercial and industrial
Allowance for loan losses, beginning balance	715,132	785,089	697,469	675,687	675,687
Charge-offs	(6,795)	0	(10,368)	(131,273)	(152,860)
Recoveries	1,690	34,818	10,768	54,858	60,192
Provisions (credit)	133,632	(34,687)	145,790	185,948	114,450
Allowance for loan losses, ending balance	843,659	785,220	843,659	785,220	697,469
Allowance for loan losses evaluated for impairment, individually	95,945		95,945		0
Allowance for loan losses evaluated for impairment, collectively	747,714		747,714		697,469
Allowance for loan losses	843,659		843,659		697,469
Loans evaluated for impairment, individually	570,172		570,172		60,846
Loans evaluated for impairment, collectively	92,074,697		92,074,697		80,705,847
Total loans	92,644,869		92,644,869		80,766,693
Commercial Real Estate
Allowance for loan losses, beginning balance	3,094,781	2,708,239	3,019,868	2,674,029	2,674,029
Charge-offs	(101,476)	0	(116,186)	(124,645)	(124,645)
Recoveries	0	0	0	0	0
Provisions (credit)	272,858	102,491	362,481	261,346	470,484
Allowance for loan losses, ending balance	3,266,163	2,810,730	3,266,163	2,810,730	3,019,868
Allowance for loan losses evaluated for impairment, individually	0		0		0
Allowance for loan losses evaluated for impairment, collectively	3,266,163		3,266,163		3,019,868
Allowance for loan losses	3,266,163		3,266,163		3,019,868
Loans evaluated for impairment, individually	1,849,290		1,849,290		1,746,894
Loans evaluated for impairment, collectively	247,750,431		247,750,431		233,571,254
Total loans	249,599,721		249,599,721		235,318,148
Municipal
Allowance for loan losses, beginning balance	0	0	0	0	0
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provisions (credit)	0	0	0	0	0
Allowance for loan losses, ending balance	0	0	0	0	0
Allowance for loan losses evaluated for impairment, individually	0		0		0
Allowance for loan losses evaluated for impairment, collectively	0		0		0
Allowance for loan losses	0		0		0
Loans evaluated for impairment, individually	0		0		0
Loans evaluated for impairment, collectively	51,935,005		51,935,005		47,067,023
Total loans	51,935,005		51,935,005		47,067,023
Residential Real Estate - 1st Lien
Allowance for loan losses, beginning balance	1,427,357	1,398,041	1,421,494	1,460,547	1,460,547
Charge-offs	(147,724)	(591)	(242,244)	(79,025)	(251,654)
Recoveries	1,059	17,353	11,131	26,511	26,832
Provisions (credit)	130,189	(18,277)	220,500	(11,507)	185,769
Allowance for loan losses, ending balance	1,410,881	1,396,526	1,410,881	1,396,526	1,421,494
Allowance for loan losses evaluated for impairment, individually	107,526		107,526		112,969
Allowance for loan losses evaluated for impairment, collectively	1,303,355		1,303,355		1,308,525
Allowance for loan losses	1,410,881		1,410,881		1,421,494
Loans evaluated for impairment, individually	5,129,666		5,129,666		4,392,060
Loans evaluated for impairment, collectively	155,926,562		155,926,562		161,273,115
Total loans	161,056,228		161,056,228		165,665,175
Residential Real Estate Jr Lien
Allowance for loan losses, beginning balance	287,984	287,602	273,445	316,982	316,982
Charge-offs	0	(12,174)	(102,000)	(36,174)	(69,173)
Recoveries	485	260	1,486	935	1,420
Provisions (credit)	(3,402)	78,108	112,136	72,053	24,216
Allowance for loan losses, ending balance	285,067	353,796	285,067	353,796	273,445
Allowance for loan losses evaluated for impairment, individually	1,709		1,709		1,757
Allowance for loan losses evaluated for impairment, collectively	283,358		283,358		271,688
Allowance for loan losses	285,067		285,067		273,445
Loans evaluated for impairment, individually	180,516		180,516		319,321
Loans evaluated for impairment, collectively	43,981,211		43,981,211		44,225,666
Total loans	44,161,727		44,161,727		44,544,987
Consumer
Allowance for loan losses, beginning balance	53,410	51,635	56,787	43,303	43,303
Charge-offs	(11,338)	(37,327)	(70,959)	(110,715)	(143,688)
Recoveries	11,489	15,865	32,805	32,656	38,018
Provisions (credit)	(454)	21,590	34,474	86,519	119,154
Allowance for loan losses, ending balance	53,107	51,763	53,107	51,763	56,787
Allowance for loan losses evaluated for impairment, individually	0		0		0
Allowance for loan losses evaluated for impairment, collectively	53,107		53,107		56,787
Allowance for loan losses	53,107		53,107		56,787
Loans evaluated for impairment, individually	0		0		0
Loans evaluated for impairment, collectively	4,709,738		4,709,738		5,088,491
Total loans	4,709,738		4,709,738		5,088,491
Unallocated
Allowance for loan losses, beginning balance	145,089	182,417	133,478	267,551	267,551
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provisions (credit)	(120,324)	60,775	(108,713)	(24,359)	(134,073)
Allowance for loan losses, ending balance	24,765	$ 243,192	24,765	$ 243,192	133,478
Allowance for loan losses evaluated for impairment, individually	0		0		0
Allowance for loan losses evaluated for impairment, collectively	24,765		24,765		133,478
Allowance for loan losses	24,765		24,765		$ 133,478
Loans evaluated for impairment, individually	0		0
Loans evaluated for impairment, collectively	0		0
Total loans	$ 0		$ 0