Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on Recurring Basis

The following table presents information about our financial instruments that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value:

	April 30, 2020
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	220,739	$	220,739	$	—	$	—
Cash equivalents	220,739		220,739		—		—
Commercial paper	11,892		—		11,892		—
Agency bonds	157,722		—		157,722		—
Corporate and other debt securities	394,011		—		394,011		—
U.S. government agency securities	50,089		—		50,089		—
Treasury bills	3,000		—		3,000		—
Marketable securities	616,714		—		616,714		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—
Certificates of deposit included in other assets, noncurrent	2,296		—		2,296		—
Convertible Note included in other assets, noncurrent	5,000		—		—		5,000
Total financial assets	$	844,849	$	220,739	$	619,110	$	5,000

	January 31, 2020
	Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Financial Assets:
Money market funds	$	96,486	$	96,486	$	—	$	—
Commercial paper	4,994		—		4,994		—
Agency bonds	9,999		—		9,999		—
Cash equivalents	111,479		96,486		14,993		—
Commercial paper	37,894		—		37,894		—
Agency bonds	141,163		—		141,163		—
Corporate and other debt securities	321,166		—		321,166		—
U.S. government agency securities	71,837		—		71,837		—
Marketable securities	572,060		—		572,060		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—
Certificates of deposit included in other assets, noncurrent	2,301		—		2,301		—
Total financial assets	$	685,940	$	96,486	$	589,454	$	—