Financial Instruments and Fair Value - Schedule of Cash Equivalents and Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Apr. 30, 2024	Jan. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 96,989	$ 106,116
Included in cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	25,452	31,103
Included in marketable debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 71,537	$ 75,013