Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Jan. 31, 2020	Jun. 25, 2015
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	$ 16,088,000		$ 16,088,000		$ 17,826,000
Accumulated amortization of intangible asset	6,388,000		6,388,000		13,477,000
Liabilities associated with noncancelable internal-use software license at net present value, current	5,041,000		5,041,000		4,388,000
Liabilities associated with noncancelable internal-use software license at net present value, non-current	6,533,000		6,533,000		8,159,000
Impairment of intangible assets	0	$ 0	0	$ 0
IPR&D [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	4,100,000		4,100,000		4,100,000
Accumulated amortization of intangible asset	0		0		0
IPR&D [Member] | Vis Lab SRL [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired						$ 4,100,000
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	11,988,000		11,988,000		13,726,000
Accumulated amortization of intangible asset	6,388,000		6,388,000		$ 13,477,000
Fully amortized software licenses retired			10,100,000
Amortization expense	$ 1,600,000	$ 1,300,000	$ 3,100,000	$ 2,600,000