Financial Instruments and Fair Value (Tables)

12 Months Ended

Jan. 31, 2019

Investments All Other Investments [Abstract]

Schedule of Available-for-Sale Securities at Fair Value

All of the investments are classified as available-for-sale securities and reported at fair value in the consolidated balance sheets as follows:

	As of January 31, 2019
	AmortizedCost		UnrealizedGains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	8,914	$	—	$	—		$	8,914
Certificates of Deposit		7,012		—		—			7,012
Commercial paper		68,233		—		—			68,233
Corporate bonds		87,250		170		(60	)		87,360
Asset-backed securities		11,607		3		(6	)		11,604
U.S. government securities		21,993		3		(13	)		21,983
Total cash equivalents and marketable debt securities	$	205,009	$	176	$	(79	)	$	205,106
	As of January 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	13,788	$	—	$	—		$	13,788
Commercial paper		5,480		—		—			5,480
Corporate bonds		53,175		—		(196	)		52,979
Asset-backed securities		11,048		—		(44	)		11,004
U.S. government securities		18,495		—		(39	)		18,456
Total cash equivalents and marketable debt securities	$	101,986	$	—	$	(279	)	$	101,707

Schedule of Cash Equivalents and Marketable Debt Securities

	As of
	January 31, 2019		January 31, 2018
	(in thousands)
Included in cash equivalents	$	40,245	$	13,788
Included in marketable debt securities		164,861		87,919
Total cash equivalents and marketable debt securities	$	205,106	$	101,707

Summary of Contractual Maturities of Investments

The contractual maturities of the investments at January 31, 2019 and 2018 were as follows:

	As of
	January 31, 2019		January 31, 2018
	(in thousands)
Due within one year	$	151,991	$	63,476
Due within one to three years		53,115		38,231
Total cash equivalents and marketable debt securities	$	205,106	$	101,707

Schedule of Fair Value of Financial Instruments Measured on Recurring Basis

The following tables present the fair value of the financial instruments measured on a recurring basis as of January 31, 2019 and 2018, respectively:

	As of January 31, 2019
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	8,914	$	8,914	$	—	$	—
Certificates of Deposit		7,012		7,012
Commercial paper		68,233		—		68,233		—
Corporate bonds		87,360		—		87,360		—
Asset-backed securities		11,604		—		11,604		—
U.S. government securities		21,983		—		21,983		—
Total cash equivalents and marketable debt securities	$	205,106	$	15,926	$	189,180	$	—
	As of January 31, 2018
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	13,788	$	13,788	$	—	$	—
Commercial paper		5,480		—		5,480		—
Corporate bonds		52,979		—		52,979		—
Asset-backed securities		11,004		—		11,004		—
U.S. government securities		18,456		—		18,456		—
Total cash equivalents and marketable debt securities	$	101,707	$	13,788	$	87,919	$	—