Acquisitions - Schedule of Estimated Fair Values and Useful Lives of Identifiable Intangible Assets Acquired (Detail) - Xstream A/S [Member] $ in Thousands	Feb. 06, 2019 USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value	$ 3,569
Customer Contracts [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Useful Life	3 years
Fair Value	$ 2,205
Existing Technology [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Useful Life	3 years
Fair Value	$ 1,364