Fair Value of Financial Instruments (Tables)

6 Months Ended

Jul. 31, 2022

Fair Value Disclosures [Abstract]

Summary of Amortized Cost, Unrealized Gain (Loss) and Estimated Fair Value of Cash Equivalents and Short-term Investments

The amortized cost, unrealized gain (loss) and estimated fair value of marketable securities were as follows (in thousands):

	July 31, 2022
	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Cash equivalents:
U.S. treasury securities	$	4,994	$	—	$	—		$	4,994
Commercial paper		—		—		—			—
Money market funds		185,970		—		—			185,970
Total cash equivalents	$	190,964	$	—	$	—		$	190,964
Short-term investments:
U.S. treasury securities	$	42,829	$	—	$	(82	)	$	42,747
Commercial paper		1,998		—		—			1,998
Total short-term investments	$	44,827	$	—	$	(82	)	$	44,745
Total cash equivalents and short-term investments	$	235,791	$	—	$	(82	)	$	235,709

	January 31, 2022
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Cash equivalents:
Money market funds	$	202,446	$	—	$	—	$	202,446
Total cash equivalents	$	202,446	$	—	$	—	$	202,446

Summary of Financial Assets Subject to Fair Value

Financial assets subject to the fair value disclosure requirements were as follows (in thousands):

	July 31, 2022
	Level 1		Level 2		Level 3		Total
Cash equivalents:
U.S. treasury securities	$	4,994	$	—	$	—	$	4,994
Commercial paper		—		—		—		—
Money market funds		185,970		—		—		185,970
Total cash equivalents	$	190,964	$	—	$	—	$	190,964
Short-term investments:
U.S. treasury securities	$	42,747	$	—	$	—	$	42,747
Commercial paper		—		1,998		—		1,998
Total short-term investments	$	42,747	$	1,998	$	—	$	44,745
Total cash equivalents and short-term investments	$	233,711	$	1,998	$	—	$	235,709

	January 31, 2022
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	202,446	$	—	$	—	$	202,446