Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities

Below is a summary of our marketable securities as of December 31, 2018 (in thousands):

	December 31, 2018
	Amortized Cost		Unrealized Loss		Estimated Fair Value
Marketable securities	$	249,944	$	(342)	$	249,602