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Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Revenue from External Customer [Line Items]
Total revenue	$ 62,142	$ 90,305
Taiwan [Member]
Revenue from External Customer [Line Items]
Total revenue	30,634	53,636
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	15,605	21,555
Europe [Member]
Revenue from External Customer [Line Items]
Total revenue	3,516	8,393
North America other than United States [Member]
Revenue from External Customer [Line Items]
Total revenue	10,877	4,886
United States [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 1,510	$ 1,835

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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-Publisher FASB
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