Commitments and Contingencies (Detail) (USD $)	Sep. 29, 2012
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 1,500,000
Operating Leases, Future Minimum Payments, Due in Three Years	1,600,000
Operating Leases, Future Minimum Payments, Due in Four Years	1,200,000
Operating Leases, Future Minimum Payments, Due in Five Years	800,000
Operating Leases, Future Minimum Payments, Due Thereafter	$ 3,700,000