Cash, Cash Equivalents and Restricted Cash - Amortized Cost, Unrealized Gain (Losses) and Estimated Fair Values (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 3,700
Total cash, cash equivalents, and restricted cash	66,500	$ 83,561
Cash
Cash and Cash Equivalents [Line Items]
Cash	38,789	42,500
Money market funds
Cash and Cash Equivalents [Line Items]
Cash equivalents	8,591	25,878
Certificates of deposit
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 15,420	$ 15,183

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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