Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale marketable securities and cash and cash equivalents

Available-for-sale marketable securities and cash and cash equivalents as of March 31, 2019 and December 31, 2018 consist of the following (in thousands):

	March 31, 2019
	Amortized Cost Value		Gross  Unrealized  Gains		Gross  Unrealized  Losses			Fair Value
Cash and cash equivalents:
Cash	$	60,535	$	—	$	—		$	60,535
Money market funds	10,969		—		—			10,969
Total	$	71,504	$	—	$	—		$	71,504
Marketable securities:
Domestic corporate debt securities	$	87,940	$	—	$	(180	)	$	87,760
Agency bonds	45,020		—		(101		)	44,919
Total	$	132,960	$	—	$	(281	)	$	132,679

	December 31, 2018
	Amortized Cost Value		Gross  Unrealized  Gains		Gross  Unrealized  Losses			Fair Value
Cash and cash equivalents:
Cash	$	20,448	$	—	$	—		$	20,448
Money market funds	38,873		—		—			38,873
Total	$	59,321	$	—	$	—		$	59,321
Marketable securities:
Domestic corporate debt securities	$	132,886	$	—	$	(530	)	$	132,356
Agency bonds	45,009		—		(225		)	44,784
Total	$	177,895	$	—	$	(755	)	$	177,140