Acquisition - Additional Information (Detail) (USD $)		1 Months Ended	9 Months Ended	1 Months Ended
	Sep. 29, 2013 External Valuation Adjustments [Member]	Dec. 31, 2012 D And R Technology [Member]	Jun. 30, 2013 D And R Technology [Member]	Jan. 31, 2012 Valpey-Fisher [Member]
Business Acquisition [Line Items]
Business acquisition price		$ 63,500,000		$ 18,300,000
Fair value of accounts receivable and (Decrease) due to external adjustments	260,000	7,693,000
Goodwill, Tax deduction period			15 years
Increased amortizable intangible assets due to fair value adjustment	1,457,000
Reduction in goodwill due to fair value adjustment	1,194,000
Increased in account payable due to fair value adjustment	$ 3,000
Percentage of common stock acquired				100.00%