Significant Customers Narrative (Detail)	3 Months Ended		9 Months Ended
	Jun. 30, 2013 customer	Jun. 30, 2012 customer	Jun. 30, 2013 customer	Jun. 30, 2012 customer
Segment Reporting Disclosure [Line Items]
Number of major customer by revenue	1	2	1	1
Percentage of revenues from one customer	12.00%		11.00%	14.00%
Customer One
Segment Reporting Disclosure [Line Items]
Percentage of revenues from one customer		14.00%
Customer Two
Segment Reporting Disclosure [Line Items]
Percentage of revenues from one customer		11.00%