Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2020

Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents information about the Company’s financial assets that were measured at fair value on a recurring basis using the above input categories (in thousands):



	As of January 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	416,584	$	—	$	—	$	416,584
U.S. treasury securities	$	—	$	19,996	$	—	19,996
Total cash equivalents	416,584		19,996		—		436,580
Short-term investments:
U.S. treasury securities	—		576,598		—		576,598
Corporate debt securities	—		306,378		—		306,378
Total short-term investments	—		882,976		—		882,976
Total cash equivalents and short-term investments	$	416,584	$	902,972	$	—	$	1,319,556



	As of January 31, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	247,426	$	—	$	—	$	247,426
Corporate debt securities	—		3,408		—		3,408
Total cash equivalents	247,426		3,408		—		250,834
Short-term investments:
U.S. treasury securities	—		195,897		—		$	195,897
Corporate debt securities	—		69,477		—		69,477
Total short-term investments	—		265,374		—		265,374
Total cash equivalents and short-term investments	$	247,426	$	268,782	$	—	$	516,208

Schedule of Carrying Amounts and Estimated Fair Values of Convertible Note

The following table presents the carrying amounts and estimated fair values of our financial instruments that are not recorded at fair value on the consolidated balance sheets (in thousands):



	As of January 31, 2020
	Net Carrying Amount⁽¹⁾		Estimated Fair Value
2023 Convertible senior notes	$	102,543	$	331,014
2025 Convertible senior notes	$	851,535	$	1,074,840