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Restructuring Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014	Sep. 27, 2013 Facility
Restructuring Cost and Reserve [Line Items]
Number of consolidated assembly and integration facilities					2
Accretion of interest expense	$ 13us-gaap_AccretionExpense	$ 10us-gaap_AccretionExpense	$ 23us-gaap_AccretionExpense	$ 21us-gaap_AccretionExpense
Severance benefits	$ 30us-gaap_SeveranceCosts1

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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