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Segment Reporting - Schedule of Results by Business Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 31, 2018 | Jul. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | $ 138,833 | $ 129,021
Cost of sales | [1] | 86,411 | 88,389
Gross margin | [1] | 52,422 | 40,632
Operating income/(loss) | [1] | 13,476 | (3,200)
Income tax expense/(benefit) | [1] | 3,812 | (2,128)
Firearms Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 104,474 | 98,357
Outdoor Products & Accessories Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 34,359 | 30,664
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | (3,681) | (2,952)
Cost of sales | [1] | (4,428) | (2,800)
Gross margin | [1] | 747 | (152)
Operating income/(loss) | [1] | 12,355 | 12,795
Intersegment Eliminations | Firearms Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 784 | 1,081
Intersegment Eliminations | Outdoor Products & Accessories Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 2,897 | 1,871
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 138,833 | 129,021
Operating Segments | Firearms Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 105,258 | 99,438
Cost of sales | [1] | 70,465 | 72,757
Gross margin | [1] | 34,793 | 26,681
Operating income/(loss) | [1] | 14,091 | 668
Income tax expense/(benefit) | [1] | 4,124 | 2,395
Operating Segments | Outdoor Products & Accessories Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total net sales | [1] | 37,256 | 32,535
Cost of sales | [1] | 20,374 | 18,432
Gross margin | [1] | 16,882 | 14,103
Operating income/(loss) | [1] | (2,418) | (4,893)
Income tax expense/(benefit) | [1] | (426) | (1,636)
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income/(loss) | [1] | (10,552) | (11,770)
Income tax expense/(benefit) | [1] | $ 114 | $ (2,887)
[1] | We allocate all of corporate overhead expenses except for interest and income taxes, such as general and administrative expenses and other corporate-level expenses, to both our Firearms and Outdoor Products & Accessories segments.

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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