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Stockholders' Equity - Summary of capital comparison with minimum requirements (Details) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
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Company |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) Actual Amount | $ 37,506,000 | $ 36,959,000 | $ 35,933,000
Total Capital (to Risk Weighted Assets) Actual Ratio | 15.50% | 14.30% | 14.10%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 20,645,810 | $ 20,329,844
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 8.00% | 8.00%
Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 34,477,000 | $ 33,728,000 | $ 32,761,000
Tier I Capital (to Risk Weighted Assets) Actual Ratio | 14.20% | 13.10% | 12.90%
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 10,322,265 | $ 10,166,330
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Tier I Capital (to Average Assets) Actual Amount | $ 34,477,000 | $ 33,728,000 | $ 32,761,000
Tier I Capital (to Average Assets) Actual Ratio | 8.80% | 8.50% | 8.70%
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount |  | $ 15,834,742 | $ 15,079,862
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 34,477,000 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Ratio | 14.20% |  |
Company | Minimum Capital Required - Basel III Phased-In Schedule |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 19,382,946 |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 8.00% |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 14,537,034 |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 6.00% |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount | $ 15,724,971 |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio | 4.00% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Amount | $ 10,902,776 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 4.50% |  |
Company | Minimum Capital Required - Basel III Fully Phased-In Schedule |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 25,440,116 |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 10.50% |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 20,594,132 |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 8.50% |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount | $ 15,724,971 |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio | 4.00% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Amount | $ 16,959,874 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 7.00% |  |
Bank |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) Actual Amount | $ 37,213,000 | $ 36,655,000 | $ 35,624,000
Total Capital (to Risk Weighted Assets) Actual Ratio | 15.40% | 14.30% | 14.10%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 20,477,654 | $ 20,183,569
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 8.00% | 8.00%
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 24,211,451 | $ 25,597,067 | $ 25,229,462
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 10.00% | 10.00% | 10.00%
Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 34,185,000 | $ 33,454,000 | $ 32,470,000
Tier I Capital (to Risk Weighted Assets) Actual Ratio | 14.10% | 13.10% | 12.90%
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount |  | $ 10,238,409 | $ 10,091,686
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 19,368,272 | $ 15,357,613 | $ 15,137,529
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 8.00% | 6.00% | 6.00%
Tier I Capital (to Average Assets) Actual Amount | $ 34,185,000 | $ 33,454,000 | $ 32,470,000
Tier I Capital (to Average Assets) Actual Ratio | 8.70% | 8.40% | 8.60%
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount |  | $ 16,006,699 | $ 15,119,907
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio |  | 4.00% | 4.00%
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 19,646,552 | $ 20,008,373 | $ 18,899,884
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 5.00% | 5.00% | 5.00%
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 34,185,000 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Ratio | 14.10% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Actual Amount | $ 15,736,721 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Actual Ratio | 6.50% |  |
Bank | Minimum Capital Required - Basel III Phased-In Schedule |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 19,369,161 |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 8.00% |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 14,526,204 |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 6.00% |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount | $ 15,717,241 |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio | 4.00% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Amount | $ 10,894,653 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 4.50% |  |
Bank | Minimum Capital Required - Basel III Fully Phased-In Schedule |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 25,422,023 |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 10.50% |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 20,578,789 |  |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 8.50% |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount | $ 15,717,241 |  |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio | 4.00% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Amount | $ 16,947,238 |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 7.00% |  |

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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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