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Investments in Marketable Securities
 12 Months Ended
Jan. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Investments in Marketable Securities Investments in Marketable Securities
The following tables summarize the Company's investments in marketable securities:
January 31, 2023
(in thousands)Amortized CostUnrealized GainsUnrealized LossesFair Value
Money market funds$68,165 $— $— $68,165 
U.S. treasury securities40,372 — (9)40,363 
Total marketable securities$108,537 $— $(9)$108,528 
January 31, 2022
(in thousands)Amortized CostUnrealized GainsUnrealized LossesFair Value
Money market funds$138,470 $— $— $138,470 
U.S. treasury securities— — — — 
Total marketable securities$138,470 $— $— $138,470 

As of January 31, 2023 and 2022, the Company's marketable securities have a maturity of 90 days or less and are classified as cash and cash equivalents. For the fiscal years ended January 31, 2023, 2022 and 2021, the Company had no material reclassification adjustments from accumulated other comprehensive loss to net loss.
The Company classifies interest income on investments in marketable securities, amortization of premiums and discounts, and realized gains and losses on securities available for sale within interest income in the consolidated statements of operations and comprehensive loss.
The Company regularly reviews its debt securities and monitors the surrounding economic conditions to assess the risk of expected credit losses. As of January 31, 2023 and 2022, the unrealized losses and the related risk of expected credit losses were not significant.