Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value

The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value as of September 30, 2016 and December 31, 2015, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):

	As of  September 30, 2016
	Level 1		Level 2		Level 3		Total
Money market funds	$	82,485	$	—	$	—	$	82,485
Corporate notes and obligations		—		8,418		—		8,418
U.S. agency securities		—		2,400		—		2,400
	$	82,485	$	10,818	$	—	$	93,303

	As of  December 31, 2015
	Level 1		Level 2		Level 3			Total
Money market funds	$	8,015	$	—	$	—		$	8,015
Corporate notes and obligations		—		2,245		—			2,245
U.S. agency securities		—		3,015		—			3,015
U.S. government treasury securities		1,000		—		—			1,000
Preferred stock warrant liability		—		—		(414	)		(414	)
	$	9,015	$	5,260	$	(414	)	$	13,861

Schedule of Reconciliation of Preferred Stock Warrant Liability Measured at Fair Value Using Significant Unobservable Inputs

The followingtable presents a reconciliationofthe preferredstockwarrantliabilitymeasured at fairvalueusingsignificantunobservableinputs (in thousands):

Balance as of December 31, 2015	$	414
Changes in fair value of underlying warrant securities, recorded to interest expense		202
Conversion of warrant, recorded to additional paid-in capital		(616	)
Balance as of September 30, 2016	$	—