Loans and Allowance for Loan Losses (Recorded Investment in Loans by Risk Category) (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 455,448	$ 441,402
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	427,313	414,392
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	14,583	14,832
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	13,177	11,954
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	375	224
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	183,311	183,670
Residential real estate | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	174,242	172,822
Residential real estate | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,710	4,233
Residential real estate | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,992	6,398
Residential real estate | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	367	217
Residential real estate | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	160,852	154,028
Commercial real estate | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	142,958	138,854
Commercial real estate | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,364	10,226
Commercial real estate | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,530	4,948
Commercial real estate | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial real estate | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Multi-family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	23,061	21,311
Multi-family residential | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	23,061	21,311
Multi-family residential | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Multi-family residential | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Multi-family residential | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Multi-family residential | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,990	16,601
Construction Loans | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,990	16,601
Construction Loans | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Construction Loans | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Construction Loans | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Construction Loans | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Land and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,648	11,325
Land and land development | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,298	11,206
Land and land development | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	255	6
Land and land development | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	95	113
Land and land development | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Land and land development | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial business loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	33,244	28,550
Commercial business loans | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	32,818	28,127
Commercial business loans | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	117	278
Commercial business loans | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	309	145
Commercial business loans | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial business loans | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total Loans	26,342	25,917
Consumer | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	25,946	25,471
Consumer | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	137	89
Consumer | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	251	350
Consumer | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8	7
Consumer | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0	$ 0