v3.26.1
Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Revenue from External Customer [Line Items]        
Total revenue $ 108,125 $ 95,511 $ 208,482 $ 181,383
Taiwan [Member]        
Revenue from External Customer [Line Items]        
Total revenue 65,118 68,137 126,098 122,036
Asia Pacific other than Taiwan [Member]        
Revenue from External Customer [Line Items]        
Total revenue 25,120 17,789 48,367 34,348
Europe [Member]        
Revenue from External Customer [Line Items]        
Total revenue 10,023 4,690 16,331 13,429
North America other than United States [Member]        
Revenue from External Customer [Line Items]        
Total revenue 5,763 4,197 13,667 9,342
United States [Member]        
Revenue from External Customer [Line Items]        
Total revenue $ 2,101 $ 698 $ 4,019 $ 2,228