Business Combination - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 28, 2012
Business Acquisition [Line Items]
Maximum earnout payments related to the revenue milestone	$ 0
Product Development Earnout
Business Acquisition [Line Items]
Offsetting employee termination expenses and costs expected to be incurred to achieve product development earnout, estimated	634,000
Contingent Consideration Liability	2,500,000
Contingent Consideration Liability Reduction	1,900,000
Product Development Earnout | Maximum
Business Acquisition [Line Items]
Earnout's fair value	4,500,000
Product Development Earnout | Minimum
Business Acquisition [Line Items]
Earnout's fair value	2,500,000
Business Development Earnout
Business Acquisition [Line Items]
Earnout's fair value	0
Pico Chip
Business Acquisition [Line Items]
Acquisition-date fair value of the consideration transferred	64,300,000
Amount paid in cash for business acquisition	20,500,000
Cash consideration transferred upon close of acquisition, escrow deposit	14,300,000
Payment of outstanding debt	$ 6,200,000