Summary of Acquisition Related Finite-lived Intangibles and Estimated Lives (Detail) - USD ($) $ in Thousands	Nov. 01, 2018	Feb. 14, 2018
3VR
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets		$ 6,300
3VR | Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets		$ 400
Estimated Useful Life (in Years)		5 years
3VR | Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets		$ 2,900
Estimated Useful Life (in Years)		10 years
3VR | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets		$ 3,000
Estimated Useful Life (in Years)		10 years
Thursby Software Systems
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets	$ 2,400
Thursby Software Systems | Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets	$ 200
Estimated Useful Life (in Years)	5 years
Thursby Software Systems | Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets	$ 1,500
Estimated Useful Life (in Years)	10 years
Thursby Software Systems | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Purchased Intangible Assets	$ 700
Estimated Useful Life (in Years)	10 years