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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 | 6 Months Ended |
--- | --- | --- | ---
Oct. 27, 2012 | Oct. 29, 2011 | Oct. 27, 2012 | Oct. 29, 2011 | Apr. 28, 2012
Net sales: |  |  |  |  |
United States | $ 125,835 | $ 117,630 | $ 241,494 | $ 215,728 |
Outside U.S. | 24,036 | 18,280 | 41,296 | 38,879 |
Net sales | 149,871 | 135,910 | 282,790 | 254,607 |
Long-lived assets: |  |  |  |  |
United States | 62,506 |  | 62,506 |  | 66,350
Outside U.S. | 1,901 |  | 1,901 |  | 2,046
Long-lived assets | $ 64,407 |  | $ 64,407 |  | $ 68,396

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