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Restructuring and Other - Additional Information (Detail) (USD $)			6 Months Ended
	Jun. 29, 2014	Jun. 29, 2014 Q3 2014 Activity	Jun. 29, 2014 Wireless Test Employee	Jun. 30, 2013 System Test and Semiconductor Test
Restructuring Cost and Reserve
Severance benefit and charges			$ 600,000	$ 600,000
Reduction in employees head count			28
Accrual balance for severance and benefits	$ 252,000	$ 252,000

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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