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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, 2015
Sep. 30, 2014
Segment Reporting Information [Line Items]    
Net revenues $ 39,230,000 $ 40,017,000
Long-Term Assets 7,778,000 7,209,000
United States [Member]    
Segment Reporting Information [Line Items]    
Net revenues 39,230,000 40,017,000
Long-Term Assets $ 7,778,000 $ 7,209,000