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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
0 Months Ended
Oct. 01, 2013
Mar. 29, 2014
Dec. 28, 2013
Net of allowance for doubtful accounts   $ 700,000 $ 600,000
Goodwill impairment 0    
Deferred revenue   9,000,000 7,400,000
Deferred profit   6,331,000 6,066,000 [1]
Accumulated other comprehensive income   $ 6,980,000 $ 6,651,000 [1]
Semiconductor Equipment [Member]
     
Percent of fair value exceeding carrying value 31.00%    
Microwave Communications [Member]
     
Percent of fair value exceeding carrying value 11.00%    
[1] Derived from December 28, 2013 audited financial statements