Cash Equivalents and Marketable Securities (Tables)

9 Months Ended

Oct. 31, 2019

Cash Equivalents And Marketable Securities [Abstract]

Summary of Marketable Securities

As of October 31, 2019 and January 31, 2019, our cash equivalents and marketable securities consisted of the following: 

	October 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Money market funds	$	99,494	$	—	$	—	$	99,494
Cash equivalents	99,494		—		—		99,494
Commercial paper	48,841		—		—		48,841
Agency bonds	78,963		12		(84)		78,891
Corporate and other debt securities	296,419		597		(37)		296,979
U.S. government agency securities	106,224		143		(2)		106,365
Treasury bills	49,428		22		—		49,450
Marketable securities	$	579,875	$	774	$	(123)	$	580,526

	January 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Money market funds	$	78	$	—	$	—	$	78
Cash equivalents	78		—		—		78
Commercial paper	1,243		—		—		1,243
Corporate bonds	53,267		—		(53)		53,214
Agency bonds	32,675		—		(71)		32,604
U.S. government agency securities	24,028		—		(11)		24,017
Treasury bills	1,699		—		—		1,699
Marketable securities	$	112,912	$	—	$	(135)	$	112,777

Summary of Contractual Maturities of Marketable Securities

The following table presents the contractual maturities of our marketable securities as of October 31, 2019 and January 31, 2019:

	As of
	October 31, 2019		January 31, 2019
	(in thousands)
Less than one year	$	370,873	$	85,077
Due in one to five years	209,653		27,700
Total	$	580,526	$	112,777