Loans Receivable (Schedule of Information Regarding the Activity in the Allowance for Loan Losses) (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance $ 1,625 $ 1,800 $ 1,800
Charge-offs (64) (510) (1,296)
Recoveries 4 2 20
Provision 235 258 1,101
Allowance for credit losses, ending balance 1,800 1,550 1,625
Allowance for credit losses, allocated to loans individually evaluated for impairment 172 451  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 1,628 1,099  
Loans receivable, total 169,125 187,944 175,628
Loans receivable, individually evaluated for impairment 3,027 5,378  
Loans receivable, collectively evaluated for impairment 166,098 182,566  
1-4 Family Real Estate [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 403 369 369
Charge-offs (55) (125)  
Provision 40 72  
Allowance for credit losses, ending balance 388 316  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 388 316  
Loans receivable, total 56,600 68,680  
Loans receivable, individually evaluated for impairment 728 1,261  
Loans receivable, collectively evaluated for impairment 55,872 67,419  
Commercial Real Estate [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 772 652 652
Charge-offs   (36)  
Provision 90 110  
Allowance for credit losses, ending balance 862 726  
Allowance for credit losses, allocated to loans individually evaluated for impairment 9 224  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 853 502  
Loans receivable, total 65,110 65,893  
Loans receivable, individually evaluated for impairment 782 965  
Loans receivable, collectively evaluated for impairment 64,328 64,928  
Construction Loans [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 10 18 18
Provision 1 5  
Allowance for credit losses, ending balance 11 23  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 11 23  
Loans receivable, total 1,363 4,277  
Loans receivable, individually evaluated for impairment   721  
Loans receivable, collectively evaluated for impairment 1,363 3,556  
Home Equity [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 156 481 481
Charge-offs   (335)  
Provision 61 29  
Allowance for credit losses, ending balance 217 175  
Allowance for credit losses, allocated to loans individually evaluated for impairment 147 44  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 70 131  
Loans receivable, total 23,316 27,694  
Loans receivable, individually evaluated for impairment 446 274  
Loans receivable, collectively evaluated for impairment 22,870 27,420  
Consumer Loan [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 78 57 57
Charge-offs (8) (14)  
Recoveries 4 2  
Provision 10 13  
Allowance for credit losses, ending balance 84 58  
Allowance for credit losses, allocated to loans individually evaluated for impairment 1 1  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 83 57  
Loans receivable, total 8,328 9,057  
Loans receivable, individually evaluated for impairment 74 128  
Loans receivable, collectively evaluated for impairment 8,254 8,929  
Commercial Loan [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses, beginning balance 206 223 223
Charge-offs (1)    
Provision 33 29  
Allowance for credit losses, ending balance 238 252  
Allowance for credit losses, allocated to loans individually evaluated for impairment 15 182  
Allowance for credit losses, allocated to loans collectively evaluated for impairment 223 70  
Loans receivable, total 14,408 12,343  
Loans receivable, individually evaluated for impairment 997 2,029  
Loans receivable, collectively evaluated for impairment $ 13,411 $ 10,314