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Cash Equivalents and Short Term Investments - Additional Information (Details)	3 Months Ended
	Apr. 30, 2024 USD ($) investment	Apr. 30, 2023 USD ($)	Jan. 31, 2024 USD ($) investment
Cash, Cash Equivalents, and Short-Term Investments [Abstract]
Reclassify from accumulated other comprehensive income (loss)	$ 0	$ 0
Contractual maturity in one year	88,800,000		$ 97,600,000
Contractual maturity greater than one year	$ 19,400,000		$ 14,700,000
Number of short-term investments in unrealized loss position, investments | investment	19		13

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Short-Term Investments, Contractual Maturity Greater Than One Year

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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