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Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands | Apr. 30, 2017 | Apr. 30, 2016
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Inventory Disclosure [Abstract] |  |  |
Finished goods | [1] | $ 61,080 | $ 26,574
Finished parts | [1] | 51,177 | 32,804
Work in process |  | 9,379 | 9,263
Raw material |  | 10,046 | 9,148
Total inventories |  | $ 131,682 | $ 77,789
[1] | The large increase in finished goods inventory was primarily due to the 2017 Acquisitions, which amounted to $22.5 million. The large increase in finished parts was primarily due to our Firearms segment inventory.

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