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Loans Receivable and Allowance for Loan Losses - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
SecurityLoan
Sep. 30, 2012
Jun. 30, 2012
Sep. 30, 2013
SecurityLoan
Sep. 30, 2012
Dec. 31, 2012
SecurityLoan
Schedule Of Financial Receivables [Line Items]            
Accruing interest $ 1,811,566     $ 1,811,566   $ 2,234,297
Number of aggregate accruing loans current 4     4    
Accrual loans (90 days or more) had been performing 1,600,000     1,600,000    
Accrual loans (90 days or more) had been performing subsequently paid off 214,000     214,000    
Loans on nonaccrual status and considered impaired 20,700,000     20,700,000   23,800,000
Recorded additional income 281,000 521,000   960,000 1,100,000  
Interest collected and recognized as income on impaired loans 627,000 76,000   847,000 514,000  
Average recorded investment in impaired loans 32,200,000     32,300,000    
Troubled debt restructuring impaired loan 4,596,250     4,596,250   11,635,026
Number of modified troubled debt restructuring loan       4   8
Number of Accruing loans 1     1    
Number of non-accruing loans 3     3    
Aggregating accruing loans 1,000,000     1,000,000    
Aggregating non-accruing loans 3,600,000     3,600,000    
Creditworthiness extends credit       75.00%    
Borrowers' creditworthiness       80.00%    
Construction loans, the maximum loan-to-value       65.00%    
Construction loans are short-term loans       18 months    
Real Estate and Accumulated Depreciation, Date of Construction       Four months    
Reduction in the allowance for loan losses     1,100,000      
Performance under loan terms       Within six months    
Delinquency status, "Open-end" credits are charged-off       180 days    
Delinquent and "Closed-end" credits are charged-off       120 days    
Consumer installment loans are charged off no later       90 days    
Recorded investment, Total 30,486,740     30,486,740   33,383,078
Recorded investment of impaired loans related allowances 3,156,881     3,156,881   968,414
Construction to permanent loans downgraded       4,730,324    
No Related Allowance Recorded [Member]
            
Schedule Of Financial Receivables [Line Items]            
Recorded investment, Total 20,100,000     20,100,000   25,000,000
Construction to Permanent Real Estate Financing Receivable Loan One [Member]
            
Schedule Of Financial Receivables [Line Items]            
Construction to permanent loans downgraded       3,700,000    
Construction to Permanent Real Estate Financing Receivable Loan Two [Member]
            
Schedule Of Financial Receivables [Line Items]            
Construction to permanent loans downgraded       1,000,000    
Commercial [Member]
            
Schedule Of Financial Receivables [Line Items]            
Troubled debt restructuring impaired loan           37,251
Recorded investment, Total 6,109,493     6,109,493   219,509
Recorded investment of impaired loans related allowances 2,200,000     2,200,000   33,280
Commercial loan that was a troubled debt restructured       37,000    
Residential Real Estate [Member]
            
Schedule Of Financial Receivables [Line Items]            
Troubled debt restructuring impaired loan 500,000     500,000   5,519,232
Recorded investment, Total 8,733,016     8,733,016   13,567,175
Recorded investment of impaired loans related allowances 325,690     325,690   83,543
Commercial loan that was a troubled debt restructured       4,400,000    
Troubled debt restructured loan upgraded       347,000    
Consumer Home Equity [Member]
            
Schedule Of Financial Receivables [Line Items]            
Troubled debt restructuring impaired loan           564,175
Troubled debt restructured loan upgraded       563,000    
Commercial Real Estate Construction Financing Receivable [Member]
            
Schedule Of Financial Receivables [Line Items]            
Commercial loan that was a troubled debt restructured       $ 2,000,000