Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	$ 15,267,000		$ 15,267,000		$ 18,703,000
Liabilities associated with noncancelable internal-use software license at net present value, current	5,677,000		5,677,000		5,582,000
Liabilities associated with noncancelable internal-use software license at net present value, non-current	2,630,000		2,630,000		6,259,000
Amortization expense	1,700,000	$ 1,700,000	4,700,000	$ 4,800,000
Impairment of intangible assets	0	$ 0	0	$ 0
Developed technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	3,953,000		3,953,000		0
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	11,314,000		11,314,000		14,603,000
IPR&D [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense	$ 0		0		$ 4,100,000
Intangible assets acquired			$ 4,100,000
Estimated economic life			7 years