Strategic Arrangement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 27, 2013	Dec. 28, 2012
Strategic Alliance And Collaboration [Line Items]
Fixed fee committed	$ 10
License fee committed	20
Strategic global partnership
Strategic Alliance And Collaboration [Line Items]
Accrual of fixed fees during the period	0.5
Siemens AG | Strategic global partnership
Strategic Alliance And Collaboration [Line Items]
Fixed fees payments made during period	2.0
Amount payable related to product development milestones	0
Commissions expense incurred	$ 0.2	$ 0