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Segment Reporting - Net Income by Segment (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2016 USD ($) | Jan. 30, 2016 USD ($) | Oct. 31, 2015 USD ($) | Aug. 01, 2015 USD ($) | May 02, 2015 USD ($) | Jan. 31, 2015 USD ($) | Nov. 01, 2014 USD ($) | Aug. 02, 2014 USD ($) | Apr. 30, 2016 USD ($) segment | May 02, 2015 USD ($) | Apr. 26, 2014 USD ($)
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Number of business units | segment |  |  |  |  |  |  |  |  | 5 |  |
Net sales | $ 138,463 | $ 123,816 | $ 157,668 | $ 150,221 | $ 158,086 | $ 118,123 | $ 173,115 | $ 166,618 | $ 570,168 | $ 615,942 | $ 551,970
Contribution margin |  |  |  |  |  |  |  |  | 62,207 | 86,616 | 87,916
Non-allocated operating expenses: |  |  |  |  |  |  |  |  |  |  |
General and administrative |  |  |  |  |  |  |  |  | 32,801 | 30,679 | 27,984
Product design and development |  |  |  |  |  |  |  |  | 26,911 | 24,652 | 23,375
Operating income |  |  |  |  |  |  |  |  | 2,495 | 31,285 | 36,557
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 987 | 1,119 | 1,294
Interest expense |  |  |  |  |  |  |  |  | (228) | (223) | (255)
Other (expense) income, net |  |  |  |  |  |  |  |  | (128) | (498) | (355)
Income before income taxes |  |  |  |  |  |  |  |  | 3,126 | 31,683 | 37,241
Income tax expense |  |  |  |  |  |  |  |  | 1,065 | 10,801 | 15,035
Net income | $ (2,930) | $ (1,953) | $ 3,168 | $ 3,776 | $ 3,839 | $ 561 | $ 7,737 | $ 8,745 | 2,061 | 20,882 | 22,206
Depreciation and amortization |  |  |  |  |  |  |  |  | 16,856 | 14,968 | 14,501
Commerical |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 148,261 | 165,793 | 154,754
Contribution margin |  |  |  |  |  |  |  |  | 13,210 | 28,541 | 30,313
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,925 | 4,846 | 4,243
Live Events |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 205,151 | 231,877 | 197,246
Contribution margin |  |  |  |  |  |  |  |  | 23,178 | 27,334 | 30,503
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,970 | 4,610 | 4,461
High School Park and Recreation [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 70,035 | 67,657 | 59,531
Contribution margin |  |  |  |  |  |  |  |  | 10,314 | 11,125 | 5,474
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,722 | 1,836 | 2,053
Transportation |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 52,249 | 48,333 | 54,861
Contribution margin |  |  |  |  |  |  |  |  | 12,466 | 10,404 | 12,810
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,364 | 1,148 | 1,132
International |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 94,472 | 102,282 | 85,578
Contribution margin |  |  |  |  |  |  |  |  | 3,039 | 9,212 | 8,816
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,227 | 1,053 | 873
Unallocated corporate depreciation |  |  |  |  |  |  |  |  |  |  |
Nonoperating income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | $ 2,648 | $ 1,475 | $ 1,739

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