Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2018

Information about Financial Assets Measured at Fair Value on Recurring Basis

The following tables present information about the Company’s financial assets measured at fair value on a recurring basis as of September 30, 2018 and March 31, 2018 based on the three-tier fair value hierarchy (in thousands):



	Fair Value Measurements as of September 30, 2018
	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Money market funds	$	105,478	$	—	$	—	$	105,478
Commercial paper	—		4,981		—		4,981
Short-term investments:
Certificates of deposit	—		29,256		—		29,256
Commercial paper	—		45,873		—		45,873
Corporate notes and bonds	—		18,395		—		18,395
U.S. treasury securities	409,793		—		—		409,793
U.S. government agencies	—		30,994		—		30,994
Restricted cash:
Money market funds	8,203		—		—		8,203
Total	$	523,474	$	129,499	$	—	$	652,973
Included in cash and cash equivalents							$	110,459
Included in short-term investments							$	534,311
Included in restricted cash							$	8,203

	Fair Value Measurements as of March 31, 2018
	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Money market funds	$	38,458	$	—	$	—	$	38,458
Commercial paper	—		21,710		—		21,710
U.S. treasury securities	2,698		—		—		2,698
U.S. government agencies	—		5,498		—		5,498
Short-term investments:
Certificates of deposit	—		20,492		—		20,492
Commercial paper	—		21,699		—		21,699
Corporate notes and bonds	—		9,794		—		9,794
U.S. treasury securities	40,187		—		—		40,187
U.S. government agencies	—		23,269		—		23,269
Restricted cash:
Money market funds	8,202		—		—		8,202
Total	$	89,545	$	102,462	$	—	$	192,007
Included in cash and cash equivalents							$	68,364
Included in short-term investments							$	115,441
Included in restricted cash							$	8,202

Classification of Available-for-Sale Short-Term Investments by Contractual Maturities

The following table classifies the Company’s available-for-sale short-term investments by contractual maturities as of September 30, 2018 and March 31, 2018 (in thousands):



	September 30, 2018		March 31, 2018
Due within one year	$	393,734	$	96,924
Due after one year through two years	140,577		18,517
Total	$	534,311	$	115,441