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Acquired Intangible Assets (Detail) - Intangible assets (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Impaired Intangible Assets [Abstract]    
Weighted Average Remaining Amortization Period 5 years 6 years
Gross $ 913 $ 913
Accumulated Amortization 503 421
Net 410 492
Customer list
   
Impaired Intangible Assets [Abstract]    
Weighted Average Remaining Amortization Period 5 years 6 years
Gross 820 820
Accumulated Amortization 410 328
Net 410 492
Non-Compete agreements
   
Impaired Intangible Assets [Abstract]    
Gross 93 93
Accumulated Amortization 93 93
Net $ 0 $ 0