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Segment Reporting - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025 USD ($)	Oct. 31, 2024	Oct. 31, 2025 USD ($) Segment	Oct. 31, 2024	Jan. 31, 2025 USD ($)
Concentration Risk [Line Items]
Number of reportable segment | Segment			1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]			srt:ChiefExecutiveOfficerMember
Segment reporting, CODM, profit (loss) measure, how used, description			The CODM uses net loss presented on a consolidated basis to evaluate the financial performance and allocate resources. The CODM also monitors budget versus actual results of the operating segment
Property and equipment, net	$ 10,725		$ 10,725		$ 9,084
Accounts receivable	$ 42,227		$ 42,227		29,767
Sales revenue, net [Member] | WT [Member] | Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	70.20%	66.10%	68.40%	63.80%
Sales revenue, net [Member] | Chicony [Member] | Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue		10.70%		10.20%
Accounts receivable [Member] | WT [Member] | Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 24,700		$ 24,700		12,300
United States [Member]
Concentration Risk [Line Items]
Property and equipment, net	5,600		5,600		3,700
Taiwan [Member]
Concentration Risk [Line Items]
Property and equipment, net	3,800		3,800		4,000
Europe [Member]
Concentration Risk [Line Items]
Property and equipment, net	1,100		1,100		1,100
Asia Pacific Region other than Taiwan [Member]
Concentration Risk [Line Items]
Property and equipment, net	$ 200		$ 200		$ 300

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