Intangible Assets - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017	Apr. 30, 2016	Jun. 25, 2015
Finite Lived Intangible Assets [Line Items]
Noncancelable software license		$ 9,800,000
Noncancelable software license, amortization expense		300,000
Impairment of intangible assets		0	$ 0
Accrued and other current liabilities [Member]
Finite Lived Intangible Assets [Line Items]
Liabilities associated with noncancelable internal-use software license at net present value, current		3,200,000
Other long-term liabilities [Member]
Finite Lived Intangible Assets [Line Items]
Liabilities associated with noncancelable internal-use software license at net present value, non-current		5,800,000
Other Entity [Member]
Finite Lived Intangible Assets [Line Items]
Committed to make license payment through January 2020	$ 10,300,000	10,300,000
Vis Lab S R L
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 4,100,000
IPR&D
Finite Lived Intangible Assets [Line Items]
Amortization of intangible asset		$ 0
IPR&D | Vis Lab S R L
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 4,100,000