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Cash Equivalents and Short Term Investments - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jul. 31, 2023 USD ($) investment	Jul. 31, 2022 USD ($)	Jul. 31, 2023 USD ($) investment	Jul. 31, 2022 USD ($)	Jan. 31, 2023 USD ($) investment
Cash and Cash Equivalents [Abstract]
Reclassify from accumulated other comprehensive income (loss)	$ 0	$ 0	$ 0	$ 0
Contractual maturity in one year	120,400,000		120,400,000		$ 122,000,000
Contractual maturity greater than one year	$ 4,000,000		$ 4,000,000		$ 5,900,000
Number of short-term investments in unrealized loss position, investments | investment	30		30		27

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Short-Term Investments, Contractual Maturity Greater Than One Year

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Short-Term Investments, Contractual Maturity In 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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