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% |