Marketable Securities (Tables)

3 Months Ended

Apr. 30, 2019

Marketable Securities [Abstract]

Summary of Marketable Securities

As of April 30, 2019 and January 31, 2019, our marketable securities consisted of the following:

	April 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Corporate bonds	$	53,717	$	52	$	(30	)	$	53,739
Agency bonds		21,482		5		(29	)		21,458
U.S. government agency securities		32,182		15		(5	)		32,192
Total	$	107,381	$	72	$	(64	)	$	107,389

	January 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
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
Total	$	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 April 30, 2019 and January 31, 2019:

	As of
	April 30, 2019		January 31, 2019
	(in thousands)
Less than one year	$	87,589	$	85,077
Due in one to five years		19,800		27,700
Total	$	107,389	$	112,777