Intangible Assets, Net - Additional Information (Detail) - USD ($)		12 Months Ended
	Nov. 05, 2021	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		$ 46,302,000	$ 18,703,000
Liabilities associated with noncancelable internal-use software license at net present value, current		6,001,000	5,582,000
Liabilities associated with noncancelable internal-use software license at net present value, non-current		1,674,000	6,259,000
Amortization expense		7,800,000	6,500,000	$ 5,900,000
Impairment of intangible assets		0	0	$ 0
Oculii Corp [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 32,800,000
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		20,296,000	0
Developed Technology [Member] | Oculii Corp [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired	17,100,000
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		12,833,000	0
Customer Relationships [Member] | Oculii Corp [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired	13,200,000
IPR&D [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		0	4,100,000
Intangible assets acquired		$ 4,100,000
Estimated economic life		7 years
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		$ 2,411,000	0
Trade Name [Member] | Oculii Corp [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 2,500,000
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of amortization expense		10,762,000	$ 14,603,000
Fully amortized software licenses retired		$ 1,500,000