Marketable Securities

3 Months Ended

Apr. 30, 2021

Marketable Securities [Abstract]

Marketable Securities

4.  Marketable Securities

The following is a summary of our marketable securities (in thousands):

	As of April 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Commercial paper	$	27,774	$	—	$	—		$	27,774
Corporate bonds		55,533		—		(44	)		55,489
Total marketable securities	$	83,307	$	—	$	(44	)	$	83,263
	As of January 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Commercial paper	$	23,171	$	—	$	—		$	23,171
Corporate bonds		79,674		7		(24	)		79,657
Total marketable securities	$	102,845	$	7	$	(24	)	$	102,828

As of April 30, 2021 and January 31, 2021, the contractual maturities of our marketable securities were all less than one year. To determine whether a decline in value is other-than temporary, we evaluate, among other factors: the duration and extent to which the fair value has been less than the carrying value and our intent and ability to retain the marketable securities for a period of time sufficient to allow for any anticipated recovery in fair value. Based on the available evidence, we concluded that the gross unrealized losses on the marketable securities as of April 30, 2021 and January 31, 2021 are temporary in nature.