Loans - Schedule of Risk Category of Loans by Class of Loans (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total	$ 852,579,080	$ 750,298,382
Pass
Financing Receivable Recorded Investment [Line Items]
Total	849,286,353	748,178,014
Special Member
Financing Receivable Recorded Investment [Line Items]
Total	327,726	32,702
Substandard
Financing Receivable Recorded Investment [Line Items]
Total	2,965,001	2,087,666
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	491,023,849	421,811,734
Commercial Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	491,023,849	421,811,734
SBA Loans-Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	122,418,052	107,427,788
SBA Loans-Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	120,800,876	106,405,966
SBA Loans-Real Estate | Special Member
Financing Receivable Recorded Investment [Line Items]
Total	311,034
SBA Loans-Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	1,306,142	1,021,822
SBA Loans—Non-Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	10,680,882	8,655,808
SBA Loans—Non-Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	10,592,099	8,594,375
SBA Loans—Non-Real Estate | Special Member
Financing Receivable Recorded Investment [Line Items]
Total	16,692	32,702
SBA Loans—Non-Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	72,091	28,731
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total	104,576,230	103,955,083
Commercial and Industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Total	102,989,462	103,601,098
Commercial and Industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	1,586,768	353,985
Home Mortgage
Financing Receivable Recorded Investment [Line Items]
Total	120,746,233	104,480,715
Home Mortgage | Pass
Financing Receivable Recorded Investment [Line Items]
Total	120,746,233	103,818,350
Home Mortgage | Substandard
Financing Receivable Recorded Investment [Line Items]
Total		662,365
Consumer
Financing Receivable Recorded Investment [Line Items]
Total	3,133,834	3,967,254
Consumer | Pass
Financing Receivable Recorded Investment [Line Items]
Total	$ 3,133,834	3,946,491
Consumer | Substandard
Financing Receivable Recorded Investment [Line Items]
Total		$ 20,763