Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments Debt And Equity Securities [Abstract]

Summary of the Fair Value of Available-for-sale Marketable Securities

As of March 31, 2019, the fair value of available-for-sale marketable securities was as follows (in thousands):

	As of March 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities:
U.S. Treasury securities	$	2,348	$	-	$	-	$	2,348
	$	2,348	$	-	$	-	$	2,348

	As of December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities:
U.S. Treasury securities	$	14,106	$	-	$	-	$	14,106
	$	14,106	$	-	$	-	$	14,106