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Segment Information Schedule of Accounts Receivable by Major Customers (Details)
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Jan. 25, 2015
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Jan. 26, 2014
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|---|---|---|
| Accounts Receivable by Major Customers | ||
| Accounts receivable from significant customers (in percent) | 30.00% | 23.00% |
| Customer B (AR) | ||
| Accounts Receivable by Major Customers | ||
| Accounts receivable from significant customers (in percent) | 20.00% | 23.00% |
| Customer C (AR) | ||
| Accounts Receivable by Major Customers | ||
| Accounts receivable from significant customers (in percent) | 10.00% | 9.00% |