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Segment Reporting - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022 USD ($)	Jul. 31, 2021	Jul. 31, 2022 USD ($) Segment	Jul. 31, 2021	Jan. 31, 2022 USD ($)
Concentration Risk [Line Items]
Number of reportable segment \| Segment			1
Property and equipment, net	$ 10,443		$ 10,443		$ 10,134
Accounts receivable	$ 37,698		$ 37,698		$ 44,307
Sales revenue, net [Member] \| WT [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	59.40%	61.60%	57.90%	62.40%
Sales revenue, net [Member] \| Chicony [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	12.90%	15.80%	12.10%	15.80%
Accounts receivable [Member] \| WT [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 16,200		$ 16,200
Accounts receivable [Member] \| Chicony [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	10,500		10,500
United States [Member]
Concentration Risk [Line Items]
Property and equipment, net	5,300		5,300
Asia Pacific [Member]
Concentration Risk [Line Items]
Property and equipment, net	3,600		3,600
Europe [Member]
Concentration Risk [Line Items]
Property and equipment, net	$ 1,600		$ 1,600