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Loans Receivable and Allowance for Loan Losses - Credit Risk Exposure of Loans Receivable, by Loan Type and Credit Quality Indicator (Detail) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]    
Total $ 435,233,055 $ 464,150,482
Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 633,192 765,469
Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 414,492,198 440,340,347
Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 20,740,857 23,810,135
Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 395,726,272 396,336,289
Pass [Member] | Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 633,192 765,469
Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 10,979,698 33,437,077
Special Mention [Member] | Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 28,527,085 34,377,116
Substandard [Member] | Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 40,002,905 36,428,751
Commercial [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 36,290,322 34,812,992
Commercial [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,712,583 1,615,759
Commercial [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 33,893,412 36,209,242
Commercial [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 6,109,493 219,509
Commercial [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 31,542,755 26,804,886
Commercial [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 27,830,172 25,563,777
Commercial [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,712,583 1,241,109
Commercial [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 175,632 7,399,006
Commercial [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 175,632 7,234,814
Commercial [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    164,191
Commercial [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,284,518 2,224,859
Commercial [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,284,518 2,014,401
Commercial [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    210,459
Commercial, Real Estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 223,883,646 247,495,321
Commercial, Real Estate [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 204,061,789 223,207,957
Commercial, Real Estate [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 19,821,857 24,287,364
Commercial, Real Estate [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 216,488,334 237,764,844
Commercial, Real Estate [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 7,395,312 9,730,477
Commercial, Real Estate [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 200,080,383 212,331,978
Commercial, Real Estate [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 193,051,087 203,149,356
Commercial, Real Estate [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 7,029,296 9,182,622
Commercial, Real Estate [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 10,804,066 16,929,236
Commercial, Real Estate [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,277,203 11,554,971
Commercial, Real Estate [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,526,863 5,374,265
Commercial, Real Estate [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 12,999,197 18,234,107
Commercial, Real Estate [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,733,499 8,503,630
Commercial, Real Estate [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 10,265,698 9,730,477
Construction [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 335,000 4,997,991
Construction [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    3,135,953
Construction [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 335,000 1,862,038
Construction [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    3,135,953
Construction [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 335,000 1,862,038
Construction [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total     
Construction [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    3,135,953
Construction [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    3,135,953
Construction [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 335,000 1,862,038
Construction [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 335,000 1,862,038
Construction to Permanent [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 10,225,669 4,851,768
Construction to Permanent [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 9,012,718 3,593,058
Construction to Permanent [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,212,951 1,258,710
Construction to Permanent [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 9,012,718 3,593,058
Construction to Permanent [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,212,951 1,258,710
Construction to Permanent [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 9,012,718 3,593,058
Construction to Permanent [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 9,012,718 3,593,058
Construction to Permanent [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction to Permanent [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total     
Construction to Permanent [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction to Permanent [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction to Permanent [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,212,951 1,258,710
Construction to Permanent [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Construction to Permanent [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,212,951 1,258,710
Residential Real Estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 113,349,382 119,033,025
Residential Real Estate [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 85,471,126 85,202,823
Residential Real Estate [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 27,878,256 33,830,202
Residential Real Estate [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 107,754,676 108,295,992
Residential Real Estate [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 5,594,706 10,737,033
Residential Real Estate [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 107,754,676 102,985,814
Residential Real Estate [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 82,973,466 77,368,459
Residential Real Estate [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 24,781,210 25,617,355
Residential Real Estate [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    5,310,178
Residential Real Estate [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    5,310,178
Residential Real Estate [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total      
Residential Real Estate [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 5,594,706 10,737,033
Residential Real Estate [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,497,660 2,524,186
Residential Real Estate [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,097,046 8,212,847
Consumer [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 47,436,453 51,343,626
Consumer [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 42,286,262 46,203,230
Consumer [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 4,516,999 4,374,927
Consumer [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 47,343,058 51,341,258
Consumer [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 93,395 2,368
Consumer [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 47,335,740 50,620,553
Consumer [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 42,243,549 46,102,332
Consumer [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 4,458,999 3,752,752
Consumer [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    662,705
Consumer [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    98,530
Consumer [Member] | Special Mention [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total    564,175
Consumer [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 100,713 60,368
Consumer [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 42,713 2,368
Consumer [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total $ 58,000 $ 58,000