Investments (Tables)

12 Months Ended

Dec. 31, 2019

Investments, Fair Value Disclosure [Abstract]

Investments in Marketable Securities

Investments in marketable securities as of December 31, 2018 consisted of the following:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
Available-for-sale—short-term:
U.S. Treasury, government and agency debt securities	$	7,526	$	—	$	(2	)	$	7,524