Basis of Presentation and Significant Accounting Policies Summary of Presentation and Significant Accounting Policies (Details) (USD $)	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
Sep. 26, 2014	Sep. 27, 2013 segment	Sep. 26, 2014 segment	Sep. 27, 2013	Dec. 31, 2014 Scenario, Forecast [Member] segment	Sep. 26, 2014 Cable Access Business [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating Income (Loss)	$ (3,538,000)	$ (2,555,000)	$ (19,409,000)	$ (22,026,000)		$ 0
Number of Reportable Segments		1	1		2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration