Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Jun. 25, 2015
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	$ 17,826,000	$ 10,936,000
Accumulated amortization of intangible asset	13,477,000	7,612,000
Liabilities associated with noncancelable internal-use software license at net present value, current	4,388,000	4,879,000
Liabilities associated with noncancelable internal-use software license at net present value, non-current	8,159,000	310,000
Impairment of intangible assets	0	0	$ 0
Vis Lab SRL [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 4,100,000
IPR&D [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	4,100,000	4,100,000
Accumulated amortization of intangible asset	0	0
IPR&D [Member] | Vis Lab SRL [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 4,100,000
Noncancelable software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	13,700,000
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	13,726,000	6,836,000
Accumulated amortization of intangible asset	13,477,000	7,612,000
Amortization expense	$ 5,900,000	$ 4,700,000	$ 3,000,000.0