Financial Instruments and Fair Value - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Money market funds or debt securities with unrealized losses for more than twelve months	$ 20,604,000
Interest income and realized gains and losses from available-for-sale debt securities	4,700,000	$ 1,700,000	$ 1,700,000
Debt Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Money market funds or debt securities with unrealized losses for more than twelve months		0
Money Market Funds [Member]
Debt Securities, Available-for-Sale [Line Items]
Money market funds or debt securities with unrealized losses for more than twelve months		$ 0
Fixed Deposit Accounts [Member]
Debt Securities, Available-for-Sale [Line Items]
Fixed deposit accounts classified as cash equivalents	$ 7,000,000