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Segment Disclosure - Net Income by Segment (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 27, 2018 USD ($) | Jan. 28, 2017 USD ($) | Jan. 27, 2018 USD ($) segment | Jan. 28, 2017 USD ($)
Segment Reporting Information |  |  |  |
Number of business units | segment |  |  | 5 |
Net sales | $ 130,316 | $ 115,719 | $ 472,353 | $ 442,857
Gross profit | 28,567 | 23,316 | 115,817 | 106,691
Selling expense | 15,271 | 14,678 | 45,560 | 45,828
Non-allocated operating expenses: |  |  |  |
General and administrative | 8,335 | 8,599 | 26,138 | 26,007
Product design and development | 8,299 | 6,973 | 26,294 | 21,142
Operating (loss) income | (3,338) | (6,934) | 17,825 | 13,714
Nonoperating income (expense): |  |  |  |
Interest income | 158 | 183 | 520 | 559
Interest expense | (40) | (56) | (173) | (174)
Other (expense) income, net | (487) | (305) | (429) | (250)
(Loss) income before income taxes | (3,707) | (7,112) | 17,743 | 13,849
Income tax expense (benefit) | 2,482 | (1,985) | 8,371 | 4,416
Net (loss) income | (6,189) | (5,127) | 9,372 | 9,433
Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 130,316 | 115,719 | 472,353 | 442,857
Gross profit | 28,567 | 23,316 | 115,817 | 106,691
Selling expense | 15,271 | 14,678 | 45,560 | 45,828
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 4,433 | 4,699 | 13,335 | 14,771
Operating Segments | Commerical |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 35,483 | 36,165 | 102,723 | 112,342
Gross profit | 7,546 | 7,711 | 21,085 | 27,418
Selling expense | 4,415 | 4,575 | 13,778 | 13,949
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 1,550 | 1,616 | 4,628 | 4,777
Operating Segments | Live Events |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 45,167 | 41,036 | 191,432 | 157,032
Gross profit | 9,747 | 6,629 | 43,056 | 30,430
Selling expense | 3,843 | 3,417 | 10,562 | 9,686
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 1,192 | 1,245 | 3,626 | 3,798
Operating Segments | High School Park and Recreation |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 11,463 | 12,653 | 69,602 | 68,977
Gross profit | 2,768 | 3,198 | 23,672 | 21,900
Selling expense | 2,726 | 2,581 | 8,073 | 7,532
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 401 | 421 | 1,245 | 1,310
Operating Segments | Transportation |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 11,189 | 9,130 | 46,577 | 39,517
Gross profit | 3,570 | 2,325 | 16,696 | 12,966
Selling expense | 945 | 952 | 3,084 | 3,461
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 281 | 311 | 860 | 957
Operating Segments | International |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 27,014 | 16,735 | 62,019 | 64,989
Gross profit | 4,936 | 3,453 | 11,308 | 13,977
Selling expense | 3,342 | 3,153 | 10,063 | 11,200
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | 284 | 423 | 835 | 1,914
Operating Segments | Unallocated |  |  |  |
Depreciation and amortization |  |  |  |
Depreciation, amortization, and impairment | $ 725 | $ 683 | $ 2,141 | $ 2,015

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