Segment Information (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Sep. 30, 2011	Oct. 01, 2010
Segment Information (Textual) [Abstract]
Percentage of accounts receivable to Comcast forming part of Net accounts receivable	14.00%		14.00%
Comcast [Member]
Segment Information (Additional Textual) [Abstract]
Percentage of revenue to major customers forming part of Net revenue	12.00%	26.00%	11.00%	19.00%