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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 |
--- | --- | --- | ---
Jan. 28, 2017 | Jan. 30, 2016 | Jan. 28, 2017 | Jan. 30, 2016 | Apr. 30, 2016
Net sales: |  |  |  |  |
Net sales | $ 115,719 | $ 123,816 | $ 442,857 | $ 431,705 |
Long-lived assets: |  |  |  |  |
Long-lived assets | 66,951 |  | 66,951 |  | $ 73,163
United States |  |  |  |  |
Net sales: |  |  |  |  |
Sales | 94,174 | 101,200 | 363,766 | 347,278 |
Long-lived assets: |  |  |  |  |
Long-lived assets | 62,676 |  | 62,676 |  | 68,233
Outside U.S. |  |  |  |  |
Net sales: |  |  |  |  |
Sales | 21,545 | $ 22,616 | 79,091 | $ 84,427 |
Long-lived assets: |  |  |  |  |
Long-lived assets | $ 4,275 |  | $ 4,275 |  | $ 4,930

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