Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Revenue from External Customer [Line Items]
Total revenue	$ 337,606	$ 331,856	$ 222,990
Taiwan [Member]
Revenue from External Customer [Line Items]
Total revenue	203,828	209,044	139,327
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	73,371	81,480	57,270
Europe [Member]
Revenue from External Customer [Line Items]
Total revenue	25,065	17,823	9,415
North America other than United States [Member]
Revenue from External Customer [Line Items]
Total revenue	23,164	18,191	10,304
United States [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 12,178	$ 5,318	$ 6,674