Intangible Assets, Net - Summary of Carrying Amounts of Intangible Assets (Detail) - USD ($)	Jul. 31, 2020	Jan. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 22,476,000	$ 31,303,000
Accumulated Amortization	(6,388,000)	(13,477,000)
Net Carrying Amount	16,088,000	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 licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,376,000	27,203,000
Accumulated Amortization	(6,388,000)	(13,477,000)
Net Carrying Amount	$ 11,988,000	$ 13,726,000