Loans and Allowance - Risk Ratings of Loans by Categories of Loans (Details) - Loans Receivable	12 Months Ended
	Dec. 31, 2015 USD ($) Contract	Dec. 31, 2014 USD ($) Contract	Dec. 31, 2013 USD ($) Contract	Dec. 31, 2012 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Total	$ 263,857,691	$ 278,230,503	$ 274,827,478
Non-accrual	3,779,749	2,777,904	$ 2,713,393
Troubled debt restructures	$ 290,368	$ 252,500
Number of TDRs accounts | Contract	2	1
Pass
Financing Receivable, Recorded Investment [Line Items]
Total	$ 252,157,084	$ 263,761,195	$ 261,838,072
Special mention
Financing Receivable, Recorded Investment [Line Items]
Total	6,782,290	8,126,375	8,213,339
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	4,221,478	6,017,072	4,710,368
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	$ 696,839	162,960	$ 65,699
Loss
Financing Receivable, Recorded Investment [Line Items]
Total		$ 162,901
Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures
Number of TDRs accounts | Contract
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total	$ 4,539,701	$ 3,518,752	$ 4,172,747
Non-accrual			$ 14,286
Troubled debt restructures	$ 240,500	$ 252,500
Number of TDRs accounts | Contract	1	1
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	$ 3,878,588	$ 3,177,639	$ 3,594,809
Commercial and Industrial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total	168,113	88,613	299,152
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	$ 493,000	$ 252,500	$ 278,786
Commercial and Industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial and Industrial | Loss
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial and Industrial | Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures
Number of TDRs accounts | Contract
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total	$ 64,271,621	$ 65,642,632	$ 68,778,608
Non-accrual		$ 1,097,112	$ 1,237,647
Troubled debt restructures
Number of TDRs accounts | Contract
Commercial Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	$ 58,706,189	$ 58,837,254	$ 59,914,422
Commercial Real Estate | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total	4,422,115	4,649,562	5,499,993
Commercial Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,143,317	$ 2,155,816	$ 3,364,193
Commercial Real Estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial Real Estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial Real Estate | Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures				$ 1,369,768
Number of TDRs accounts | Contract
Consumer and Indirect
Financing Receivable, Recorded Investment [Line Items]
Total	$ 75,302,771	$ 84,103,142	$ 73,230,433
Non-accrual	$ 596,329	$ 515,352	$ 338,212
Troubled debt restructures
Number of TDRs accounts | Contract
Consumer and Indirect | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	$ 72,975,858	$ 80,501,928	$ 71,554,400
Consumer and Indirect | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total	1,652,579	2,555,654	1,102,091
Consumer and Indirect | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	509,211	882,600	508,243
Consumer and Indirect | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	$ 165,123	$ 162,960	$ 65,699
Consumer and Indirect | Loss
Financing Receivable, Recorded Investment [Line Items]
Total
Consumer and Indirect | Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures
Number of TDRs accounts | Contract
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total	$ 119,743,598	$ 124,965,977	$ 128,645,690
Non-accrual	3,183,420	$ 1,165,440	$ 1,123,248
Troubled debt restructures	$ 49,868
Number of TDRs accounts | Contract	1
Residential Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	$ 116,596,449	$ 121,244,374	$ 126,774,441
Residential Real Estate | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total	539,483	832,546	1,312,103
Residential Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	2,075,950	$ 2,726,156	$ 559,146
Residential Real Estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	$ 531,716
Residential Real Estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total		$ 162,901
Residential Real Estate | Non-performing TDRs
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructures				$ 832,500
Number of TDRs accounts | Contract