Operating Segment Information - Schedule of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				33 Months Ended
	Sep. 28, 2014	Jun. 29, 2014	Dec. 29, 2013	Sep. 29, 2013	Sep. 28, 2014
Segment Reporting Information [Line Items]
Consolidated net revenues	$ 103,809			$ 114,832
Operating (loss) income	1,133			(3,252)
Stock-based compensation	(3,531)			(4,572)
Amortization of intangibles	(6,954)			(7,764)
Patent litigation damages, license fees and royalties	(1,725)			(1,497)
Mitigation expenses related to the Broadcom patents	(200)			(2,500)	(21,900)
Restructuring Charges	373	(1,100)	(8,100)
Total assets	716,654	717,923			716,654
Goodwill	248,519	248,519			248,519
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	12,963			13,473
Operating Segments [Member] | Connectivity [Member]
Segment Reporting Information [Line Items]
Consolidated net revenues	97,935			104,735
Operating (loss) income	15,918			14,717
Total assets	570,083	568,709			570,083
Goodwill	177,290	177,290			177,290
Operating Segments [Member] | Visibility [Member]
Segment Reporting Information [Line Items]
Consolidated net revenues	5,874			10,097
Operating (loss) income	(2,955)			(1,244)
Total assets	146,571	149,214			146,571
Goodwill	71,229	71,229			71,229
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	(11,830)			(16,725)
Stock-based compensation	(3,531)			(4,572)
Amortization of intangibles	(6,954)			(7,764)
Patent litigation damages, license fees and royalties	(1,725)			(1,497)
Mitigation expenses related to the Broadcom patents	(174)			(2,519)
Restructuring Charges	373			0
Other	$ 181			$ (373)