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Segment Information (Detail) - Major customers (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Customer A
   
Segment Reporting Information [Line Items]    
Amount (in Dollars) $ 6.1 $ 5.1
% of Revenues 29.00% 24.00%
Customer B
   
Segment Reporting Information [Line Items]    
Amount (in Dollars) $ 3.3 $ 2.6
% of Revenues 15.00% 12.00%