Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Hierarchy

Note 4 – Fair Value Measurements

The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value (in thousands):

	Fair Value at September 30, 2017						Fair Value at December 31, 2016
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets
Money market funds(1)	$	36,047	$	—	$	—	$	95,896	$	—	$	—
Asset-backed securities(2)		—		28,451		—		—		42,632		—
Corporate debt securities(3)		—		93,927		—		—		79,470		—
Total assets	$	36,047	$	122,378	$	—	$	95,896	$	122,102	$	—
Liabilities
Convertible notes payable	$	—	$	145,805	$	—	$	—	$	141,989	$	—

(1) Classified as cash and cash equivalents as of September 30, 2017 and December 31, 2016, respectively (see Note 3).

(2) Includes $14,000 and $19,000 classified as cash and cash equivalents as of September 30, 2017 and December 31, 2016, respectively (see Note 3).

(3) Includes $40,057 and $11,976 classified as cash and cash equivalents as of September 30, 2017 and December 31, 2016, respectively (see Note 3).