Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Measurements

Schedule of fair value of assets measured at fair value on a recurring basis, by level of fair value hierarchy

	March 31, 2019
	Fair Value Measured Using						Total
	(Level 1)		(Level 2)		(Level 3)		Balance
Assets
Cash equivalents	$	38,413	$	—	$	—	$	38,413
Marketable securities		—		66,831		—		66,831
	$	38,413	$	66,831	$	—	$	105,244

	December 31, 2018
	Fair Value Measured Using						Total
	(Level 1)		(Level 2)		(Level 3)		Balance
Assets
Cash equivalents	$	38,698	$	—	$	—	$	38,698
Marketable securities		—		75,401		—		75,401
	$	38,698	$	75,401	$	—	$	114,099

Schedule of fair value of available for sale marketable securities

	March 31, 2019
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. Government agency securities	$	39,355	$	8	$	—	$	39,363
Corporate debt obligations		27,465		3		—		27,468
	$	66,820	$	11	$	—	$	66,831

	December 31, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. Government agency securities	$	49,124	$	—	$	(27)	$	49,097
Corporate debt obligations		26,311		—		(7)		26,304
	$	75,435	$	—	$	(34)	$	75,401