Segment Information (Details) $ in Thousands		3 Months Ended			6 Months Ended		9 Months Ended
		Jul. 01, 2016 USD ($)	Jul. 03, 2015 USD ($)	Dec. 31, 2014 segment	Jul. 01, 2016 USD ($)	Jul. 03, 2015 USD ($)	Sep. 26, 2014 segment
Segment Reporting Information [Line Items]
Provision for excess and obsolete inventories					$ 5,203	$ 843
Revenue, Net		$ 109,571	$ 103,103		191,403	207,119
Income (loss) from operations		(18,118)	(343)		(38,874)	(330)
Operating Expenses		(69,158)	(54,728)		(130,568)	(109,743)
Stock-based compensation		(2,768)	(3,884)		(5,862)	(8,018)
Amortization of intangibles		(5,539)	(1,532)		(8,322)	(3,439)
Nonoperating Income (Expense)		(2,319)	76		(6,225)	(2,880)
Loss before income taxes		$ (20,437)	(267)		$ (45,099)	(3,210)
Number of Reportable Segments | segment				2			1
Business Acquisition, Percentage of Voting Interests Acquired		100.00%			100.00%
Video [Member]
Segment Reporting Information [Line Items]
Revenue, Net		$ 90,588	78,207		$ 155,596	147,489
Cable Edge [Member]
Segment Reporting Information [Line Items]
Revenue, Net		18,983	24,896		35,807	59,630
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations		20	5,258		(9,180)	11,356
Operating Segments [Member] | Video [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations		518	4,901		(6,829)	4,811
Operating Segments [Member] | Cable Edge [Member]
Segment Reporting Information [Line Items]
Provision for excess and obsolete inventories		4,500
Income (loss) from operations		(498)	357		(2,351)	6,545
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating Expenses	[1]	$ (9,831)	$ (185)		$ (15,510)	$ (229)

[1] Unallocated corporate expenses include certain corporate-level operating expenses and charges such as restructuring and related charges and excess facilities charges. Additionally, the unallocated corporate expenses in 2016 include TVN acquisition- and integration-related costs (see Note 3, “Business Acquisition” for additional information) and an inventory obsolescence charge of approximately $4.5 million recorded in the second quarter of 2016 for some older Cable Edge product lines in accordance with the Company’s policy for excess and obsolete inventory and also as part of our strategic plan to re-position and dedicate the Company’s primary Cable Edge resources to its new CableOS products.