Financial Instruments and Fair Value - Schedule of Cash Equivalents and Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Apr. 30, 2025	Jan. 31, 2025
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 118,291	$ 109,492
Included in cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	189	3,849
Included in marketable debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 118,102	$ 105,643