Acquisitions - Identifiable Intangible Assets Acquired and Respective Weighted Average Lives (Detail) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2019	Apr. 30, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Total intangible assets, gross	$ 173,147	$ 172,213
Weighted Average Life (In years)	5 years
Developed technology
Acquired Finite Lived Intangible Assets [Line Items]
Total intangible assets, gross	$ 21,230	21,130
Weighted Average Life (In years)	6 years
Customer relationships
Acquired Finite Lived Intangible Assets [Line Items]
Total intangible assets, gross	$ 92,560	$ 92,360
Weighted Average Life (In years)	5 years
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