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Investments in Marketable Securities
 12 Months Ended
Jan. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Investments in Marketable Securities Investments in Marketable Securities
As of January 31, 2020, the Company had no marketable securities on its consolidated balance sheet. The following table summarize the Company's investments in marketable securities as of January 31, 2019:
(in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Corporate bonds  $16,949  $—  $(28) $16,921  
U.S. treasury securities  34,112  —  (12) 34,100  
Total marketable securities$51,061  $—  $(40) $51,021  
The Company classifies interest income on investments in marketable securities, amortization of premiums and accretion of discounts, realized gains and losses and other-than-temporary declines in fair value on securities available for sale within Interest income in the statement of operations and comprehensive loss.The Company had no material reclassification adjustments out of accumulated other comprehensive loss into net loss in any of the periods presented.