Financial Instruments and Fair Value - Schedule of Cash Equivalents and Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 109,492	$ 113,116
Included in cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	3,849	38,103
Included in marketable debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 105,643	$ 75,013