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Net Sales - Breakdown of Export Net Sales (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2016
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 172,026 | $ 157,376 | $ 148,427 | $ 129,021 | $ 229,186 | $ 233,523 | $ 233,528 | $ 206,951 | $ 606,850 | [1] | $ 903,188 | [1] | $ 722,908 | [1]
Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 9,586 |  | 11,545 |  | 8,913 |
Asia |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,725 |  | 4,046 |  | 3,989 |
Latin America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,038 |  | 1,778 |  | 2,593 |
All others international |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 12,388 |  | 10,418 |  | 9,120 |
Total International |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 28,737 |  | $ 27,787 |  | $ 24,615 |
[1] | For the years ended April 30, 2018, 2017, and 2016, we allocated 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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