Investments

12 Months Ended

Dec. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

Cash and cash equivalents and investments as of December 31, 2019 included the following:

			GROSS		GROSS
	AMORTIZED		UNREALIZED		UNREALIZED			FAIR
(in thousands)	COST		GAINS		LOSSES			VALUE
Cash and cash equivalents:
Cash and cash equivalents	$	143,940	$	—	$	—		$	143,940
Total cash and cash equivalents	$	143,940	$	—	$	—		$	143,940
Investments:
Commercial paper (due within 1 year)	$	64,629	$	—	$	(7	)	$	64,622
Corporate bonds (due within 1 year)	60,640		—		(76		)	60,564
U.S. Government and government agencies (due within 1 year)	40,073		—		(9		)	40,064
Total investments	$	165,342	$	—	$	(92	)	$	165,250
Total cash, cash equivalents and investments	$	309,282	$	—	$	(92	)	$	309,190

Cash, cash equivalents and investments as of December 31, 2018 included the following:

			GROSS		GROSS
	AMORTIZED		UNREALIZED		UNREALIZED		FAIR
(in thousands)	COST		GAINS		LOSSES		VALUE
Cash and cash equivalents:
Cash and cash equivalents	$	202,818	$	—	$	—	$	202,818
Total cash and cash equivalents	$	202,818	$	—	$	—	$	202,818