Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Financial Instruments Measured at Fair Value on Recurring Basis

The following table sets forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):

Balance as of March 31, 2017	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (i)	$	9,819	$	—	$	—	$	9,819
Commercial paper (ii)		—		125,747		—		125,747
Corporate notes (ii)		—		119,205		—		119,205
Total assets	$	9,819	$	244,952	$	—	$	254,771

Balance as of December 31, 2016	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (i)	$	35,510	$	—	$	—	$	35,510
Commercial paper (ii)		—		160,582		—	$	160,582
Corporate notes (ii)		—		74,369		—	$	74,369
Total assets	$	35,510	$	234,951	$	—	$	270,461

(i) Included in cash and cash equivalents on the condensed consolidated balance sheets.

(ii) Included in short-term investments on the condensed consolidated balance sheets.