Loans and Allowance - Impaired Financing Receivables (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Specific Reserve with specific reserves	$ 1,270,159
Loans Receivable
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	4,685,183	3,418,966	4,435,425
Unpaid Principal Balance with specific reserves	4,685,183	3,418,966	5,035,425
Interest Income Recognized with specific reserves	220,420	103,611	146,945
Specific Reserve with specific reserves	1,270,159	1,163,567	1,314,777
Average Recorded Investment with specific reserves	4,791,097	3,516,699	4,479,960
Recorded Investment with no specific reserve	1,760,493	2,489,830	2,962,868
Unpaid Principal Balance with no specific reserve	1,821,688	2,489,830	3,182,303
Interest Income Recognized with no specific reserve	51,189	85,840	75,050
Average Recorded Investment with no specific reserve	1,430,076	2,353,983	4,235,843
Loans Receivable \| Real-estate - mortgage Residential
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	2,726,247	559,146	180,416
Unpaid Principal Balance with specific reserves	2,726,247	559,146	180,416
Interest Income Recognized with specific reserves	177,707	15,768	11,838
Specific Reserve with specific reserves	682,642	155,330	35,916
Average Recorded Investment with specific reserves	2,747,299	563,961	182,019
Recorded Investment with no specific reserve	204,896	1,070,497	1,364,612
Unpaid Principal Balance with no specific reserve	266,091	1,070,497	1,812,535
Interest Income Recognized with no specific reserve	2,641	39,257	75,050
Average Recorded Investment with no specific reserve	340,435	1,071,479	1,794,861
Loans Receivable \| Real-estate - mortgage Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	1,094,708	2,187,294	3,610,735
Unpaid Principal Balance with specific reserves	1,094,708	2,187,294	4,210,735
Interest Income Recognized with specific reserves	783	55,535	99,079
Specific Reserve with specific reserves	148,791	550,794	807,735
Average Recorded Investment with specific reserves	1,162,367	2,271,949	3,642,095
Recorded Investment with no specific reserve	1,061,108	1,176,899	1,369,768
Unpaid Principal Balance with no specific reserve	1,061,108	1,176,899	1,369,768
Interest Income Recognized with no specific reserve	48,548	46,583
Average Recorded Investment with no specific reserve	1,089,641	1,231,505	2,440,982
Loans Receivable \| Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	611,728	393,740	75,513
Unpaid Principal Balance with specific reserves	611,728	393,740	75,513
Interest Income Recognized with specific reserves	30,903	20,767	7,759
Specific Reserve with specific reserves	186,226	178,657	20,000
Average Recorded Investment with specific reserves	622,854	394,356	76,098
Recorded Investment with no specific reserve	60,656	10,602	738
Unpaid Principal Balance with no specific reserve	60,656	10,602
Interest Income Recognized with no specific reserve
Average Recorded Investment with no specific reserve
Loans Receivable \| Installment
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves			147,301
Unpaid Principal Balance with specific reserves			147,301
Interest Income Recognized with specific reserves			7,806
Specific Reserve with specific reserves			29,666
Average Recorded Investment with specific reserves			147,574
Recorded Investment with no specific reserve	433,833	180,204	227,750
Unpaid Principal Balance with no specific reserve	433,833	180,204
Interest Income Recognized with no specific reserve
Average Recorded Investment with no specific reserve
Loans Receivable \| Home Equity
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves
Unpaid Principal Balance with specific reserves
Interest Income Recognized with specific reserves
Specific Reserve with specific reserves
Average Recorded Investment with specific reserves
Recorded Investment with no specific reserve		51,628
Unpaid Principal Balance with no specific reserve		51,628
Interest Income Recognized with no specific reserve
Average Recorded Investment with no specific reserve		50,999
Loans Receivable \| Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	252,500	278,786	421,460
Unpaid Principal Balance with specific reserves	252,500	278,786	421,460
Interest Income Recognized with specific reserves	11,027	11,541	20,463
Specific Reserve with specific reserves	252,500	278,786	421,460
Average Recorded Investment with specific reserves	258,577	286,433	432,174
Recorded Investment with no specific reserve
Unpaid Principal Balance with no specific reserve
Interest Income Recognized with no specific reserve
Average Recorded Investment with no specific reserve

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

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Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

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Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

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Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

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Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.

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Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

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