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Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 26, 2013 | Jan. 28, 2012 | Jan. 26, 2013 | Jan. 28, 2012 | Apr. 28, 2012
Net sales: |  |  |  |  |
United States | $ 89,300 | $ 94,537 | $ 330,995 | $ 310,266 |
Outside U.S. | 21,750 | 28,388 | 62,845 | 67,266 |
Net sales | 111,050 | 122,925 | 393,840 | 377,532 |
Long-lived assets: |  |  |  |  |
United States | 60,984 |  | 60,984 |  | 66,350
Outside U.S. | 1,682 |  | 1,682 |  | 2,046
Long-lived assets | $ 62,666 |  | $ 62,666 |  | $ 68,396

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