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Nature of Operations and Summary of Significant Accounting Policies - Revenues and Long-Term Assets Information Concerning Principal Geographic Areas (Detail) (USD $)
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information [Line Items]    
Revenues $ 48,943,000 $ 63,182,000
Long-Term Assets 8,157,000 8,222,000
United States [Member]
   
Segment Reporting Information [Line Items]    
Revenues 48,943,000 63,182,000
Long-Term Assets 7,913,000 7,978,000
United Kingdom [Member]
   
Segment Reporting Information [Line Items]    
Revenues      
Long-Term Assets $ 244,000 $ 244,000