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Acquisitions - Identifiable Intangible Assets Acquired and Respective Weighted Average Lives (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Apr. 30, 2018 | Apr. 30, 2017
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 172,213 | $ 179,759
Weighted Average Life (In years) |  | 5 years |
Developed technology |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 21,130 | 19,430
Weighted Average Life (In years) |  | 6 years |
Customer relationships |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross | [1] | $ 92,360 | 105,260
Weighted Average Life (In years) |  | 5 years |
Order backlog |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 1,150 | $ 1,150
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | 6,400 |
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC | Developed technology |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 1,700 |
Weighted Average Life (In years) |  | 5 years 10 months 24 days |
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC | Customer relationships |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 1,600 |
Weighted Average Life (In years) |  | 5 years 2 months 12 days |
Gemini Technologies, Incorporated and Bubba Blade Branded Products from Fish Tales, LLC | Trade names |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 3,100 |
Weighted Average Life (In years) |  | 5 years 7 months 6 days |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 83,350 |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Developed technology |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 3,000 |
Weighted Average Life (In years) |  | 4 years 1 month 6 days |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Customer relationships |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 62,100 |
Weighted Average Life (In years) |  | 5 years |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Trade names |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 17,000 |
Weighted Average Life (In years) |  | 4 years 9 months 18 days |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Order backlog |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 1,150 |
Weighted Average Life (In years) |  | 3 months 18 days |
Taylor Brands, LLC, Crimson Trace Corporation and Ultimate Survival Technologies, Inc. | Non-competition agreement |  |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, gross |  | $ 100 |
Weighted Average Life (In years) |  | 3 years 4 months 24 days |
[1] | Changes to the gross carrying amount of customer relationships is related to purchase accounting adjustments. For more information regarding the changes in valuation of customer relations, see Note 2 — Acquisitions to our consolidated financial statements.

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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