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Segment Disclosure - Net Income by Segment (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 29, 2016 USD ($) | Oct. 31, 2015 USD ($) | Oct. 29, 2016 USD ($) segment | Oct. 31, 2015 USD ($)
Segment Reporting Information |  |  |  |
Number of business units | segment |  |  | 5 |
Net sales | $ 169,992 | $ 157,668 | $ 327,138 | $ 307,889
Contribution margin | 28,417 | 20,688 | 52,225 | 41,925
Depreciation and amortization |  |  |  |
Depreciation and amortization | 5,472 | 4,226 | 10,072 | 8,314
Non-allocated operating expenses: |  |  |  |
General and administrative | 8,625 | 8,116 | 17,408 | 16,286
Product design and development | 7,126 | 6,975 | 14,169 | 13,943
Operating income | 12,666 | 5,597 | 20,648 | 11,696
Nonoperating income (expense): |  |  |  |
Interest income | 171 | 266 | 376 | 564
Interest expense | (76) | (28) | (118) | (90)
Other income (expense), net | 149 | (231) | 55 | (674)
Income before income taxes | 12,910 | 5,604 | 20,961 | 11,496
Income tax expense | 3,889 | 2,436 | 6,401 | 4,552
Net income | 9,021 | 3,168 | 14,560 | 6,944
Commerical |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 39,923 | 40,066 | 76,177 | 83,276
Contribution margin | 5,837 | 3,993 | 10,333 | 10,106
Depreciation and amortization |  |  |  |
Depreciation and amortization | 1,594 | 1,134 | 3,161 | 2,391
Live Events |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 55,363 | 50,761 | 115,996 | 98,683
Contribution margin | 8,658 | 6,802 | 17,533 | 12,985
Depreciation and amortization |  |  |  |
Depreciation and amortization | 1,273 | 1,097 | 2,553 | 2,418
High School Park and Recreation [Member] |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 28,707 | 24,253 | 56,324 | 43,212
Contribution margin | 6,750 | 3,785 | 13,749 | 7,560
Depreciation and amortization |  |  |  |
Depreciation and amortization | 451 | 368 | 889 | 858
Transportation |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 16,101 | 13,294 | 30,387 | 27,061
Contribution margin | 4,531 | 3,183 | 8,132 | 6,363
Depreciation and amortization |  |  |  |
Depreciation and amortization | 324 | 339 | 646 | 668
International |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 29,898 | 29,294 | 48,254 | 55,657
Contribution margin | 2,641 | 2,925 | 2,478 | 4,911
Depreciation and amortization |  |  |  |
Depreciation and amortization | 1,162 | 342 | 1,491 | 598
Unallocated |  |  |  |
Depreciation and amortization |  |  |  |
Depreciation and amortization | $ 668 | $ 946 | $ 1,332 | $ 1,381

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