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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 $)
Jun. 30, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]    
Total $ 452,383,006 $ 464,150,482
Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 657,208 765,469
Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 425,817,790 440,340,347
Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 26,565,216 23,810,135
Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 399,054,794 396,336,289
Pass [Member] | Loan to Value Ratio Other [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 657,208 765,469
Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 18,838,805 33,437,077
Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 34,489,407 34,377,116
Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 36,278,299 36,428,751
Commercial [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 27,432,286 34,812,992
Commercial [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,846,013 1,615,759
Commercial [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 29,929,374 36,209,242
Commercial [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 6,348,925 219,509
Commercial [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 26,785,642 26,804,886
Commercial [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 24,279,503 25,563,777
Commercial [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,506,139 1,241,109
Commercial [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 946,488 7,399,006
Commercial [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 946,488 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 8,546,169 2,224,859
Commercial [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,206,295 2,014,401
Commercial [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 6,339,874 210,459
Commercial, Real Estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 236,223,829 247,495,321
Commercial, Real Estate [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 213,036,972 223,207,957
Commercial, Real Estate [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 23,186,857 24,287,364
Commercial, Real Estate [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 226,700,322 237,764,844
Commercial, Real Estate [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 9,523,507 9,730,477
Commercial, Real Estate [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 203,149,177 212,331,978
Commercial, Real Estate [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 196,311,404 203,149,356
Commercial, Real Estate [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 6,837,773 9,182,622
Commercial, Real Estate [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 17,891,383 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 12,619,340 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 5,272,043 5,374,265
Commercial, Real Estate [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 15,183,269 18,234,107
Commercial, Real Estate [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 4,106,228 8,503,630
Commercial, Real Estate [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 11,077,041 9,730,477
Construction [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,470,518 4,997,991
Construction [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,135,518 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 3,470,518 1,862,038
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] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,470,518 1,862,038
Construction [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,135,518  
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 9,904,369 4,851,768
Construction to Permanent [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,675,940 3,593,058
Construction to Permanent [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,228,429 1,258,710
Construction to Permanent [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,675,940 3,593,058
Construction to Permanent [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,228,429 1,258,710
Construction to Permanent [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,675,940 3,593,058
Construction to Permanent [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 8,675,940 3,593,058
Construction to Permanent [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,228,429 1,258,710
Construction to Permanent [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 1,228,429 1,258,710
Residential Real Estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 117,416,181 119,033,025
Residential Real Estate [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 88,644,271 85,202,823
Residential Real Estate [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 28,771,910 33,830,202
Residential Real Estate [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 111,460,814 108,295,992
Residential Real Estate [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 5,955,367 10,737,033
Residential Real Estate [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 111,460,814 102,985,814
Residential Real Estate [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 86,632,838 77,368,459
Residential Real Estate [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 24,827,976 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] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 5,955,367 10,737,033
Residential Real Estate [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 2,011,433 2,524,186
Residential Real Estate [Member] | Substandard [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 3,943,934 8,212,847
Consumer [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 49,089,810 51,343,626
Consumer [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 43,896,571 46,203,230
Consumer [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 4,536,031 4,374,927
Consumer [Member] | Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 49,051,340 51,341,258
Consumer [Member] | Non Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 38,470 2,368
Consumer [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 48,983,221 50,620,553
Consumer [Member] | Pass [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 43,847,982 46,102,332
Consumer [Member] | Pass [Member] | 75% or more Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 4,478,031 3,752,752
Consumer [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 934 662,705
Consumer [Member] | Special Mention [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 934 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 105,655 60,368
Consumer [Member] | Substandard [Member] | Less than 75% Loan to Value Ratio [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Total 47,655 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