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Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Feb. 01, 2020 | Jan. 26, 2019 | Feb. 01, 2020 | Jan. 26, 2019 | Apr. 27, 2019
Net sales: |  |  |  |  |
Net sales | $ 127,657 | $ 115,069 | $ 482,824 | $ 441,949 |
Long-lived assets: |  |  |  |  |
Long-lived assets | 66,368 |  | 66,368 |  | $ 65,314
United States |  |  |  |  |
Net sales: |  |  |  |  |
Net sales | 103,347 | 94,418 | 399,913 | 361,679 |
Long-lived assets: |  |  |  |  |
Long-lived assets | 58,414 |  | 58,414 |  | 59,192
Outside United States |  |  |  |  |
Net sales: |  |  |  |  |
Net sales | 24,310 | $ 20,651 | 82,911 | $ 80,270 |
Long-lived assets: |  |  |  |  |
Long-lived assets | $ 7,954 |  | $ 7,954 |  | $ 6,122

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