Intangible Assets, Net - Summary of Carrying Amounts of Intangible Assets (Detail) - USD ($)	Jan. 31, 2021	Jan. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 25,143,000	$ 31,303,000
Accumulated Amortization	(6,440,000)	(13,477,000)
Net Carrying Amount	18,703,000	17,826,000
In-process research and development [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,100,000	4,100,000
Accumulated Amortization	0	0
Net Carrying Amount	4,100,000	4,100,000
Internal-use software license [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,043,000	27,203,000
Accumulated Amortization	(6,440,000)	(13,477,000)
Net Carrying Amount	$ 14,603,000	$ 13,726,000