Property and Equipment (Tables)

12 Months Ended

Dec. 30, 2017

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

(In thousands)	December 30, 2017			December 31, 2016
Buildings	$	—		$	3,554
Computer and test equipment	155,492			162,388
Office furniture and equipment	2,914			3,460
Leasehold and building improvements	13,277			14,865
	171,683			184,267
Accumulated depreciation and amortization	(131,260		)	(134,786		)
	$	40,423		$	49,481