Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Loss	$ (54,612)	$ (9,732)
Other comprehensive income, net of tax:
Unrealized gain on short-term investments, net of tax		18
Comprehensive Net Loss	$ (54,612)	$ (9,714)