Segment Information - Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended														12 Months Ended
	Dec. 31, 2015	[1]	Oct. 02, 2015	[2]	Jul. 03, 2015	Apr. 03, 2015	[3]	Dec. 31, 2014	[1]	Sep. 26, 2014	[1],[2]	Jun. 27, 2014	[1]	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenue, total	$ 86,603		$ 83,305		$ 103,103	$ 104,016		$ 107,875		$ 108,061		$ 109,589		$ 108,032	$ 377,027	$ 433,557	$ 461,940
Operating Expenses															(215,660)	(233,919)	(243,469)
Allocated Share-based Compensation Expense															(15,582)	(17,287)	(16,002)
Amortization of Intangible Assets															(6,502)	(20,520)	(27,329)
Operating Income (Loss)															(12,948)	(21,571)	(23,024)
Nonoperating Income (Expense)															(3,120)	(224)	(128)
Loss from continuing operations before income taxes															(16,068)	(21,795)	(23,152)
Video [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenue, total															291,779	326,756	381,994
Cable Edge [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenue, total															85,248	106,801	79,946
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)															11,930	19,312	23,301
Operating Segments [Member] | Video [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)															13,529	18,073	24,583
Operating Segments [Member] | Cable Edge [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)															(1,599)	1,239	(1,282)
Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Expenses															$ (2,794)	$ (3,076)	$ (2,994)

[1] A history of operating losses in recent years has led to uncertainty with respect to the Company’s ability to realize certain net deferred tax assets, and as a result, the Company recorded increased valuation allowances of $24.5 million, $4.2 million and $0.3 million, in the second, third and fourth quarters of fiscal 2014, respectively, against its U.S. net deferred tax assets. In 2015, the Company continued to record a valuation allowance against all of its U.S. net deferred tax assets, resulting in an increase in valuation allowance of $3.1 million in the fourth quarter of fiscal 2015. This increase in valuation allowance is offset partially by the release of $0.9 million valuation allowance against one of its Israel subsidiaries due to cumulative income generated in recent years.

[2] In the third quarter of fiscal 2015 and 2014, the Company recorded tax benefits of $0.5 million and $9.0 million, respectively, resulting from the expiration of the applicable statute of limitations relating to the tax audits in the U.S. for the years of 2011 and 2010, respectively.

[3] In the first quarter of fiscal 2015, the Company recorded an impairment charge of $2.5 million for its investment in VJU iTV Development GmbH as a result of its assessment that this investment was impaired on an other-than-temporary basis (See Note 5, “Investments in Other Equity Securities,” of the notes to our Consolidated Financial Statements for additional information).