CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (26,468)	$ (40,853)	$ (85,349)	$ (77,673)
Other comprehensive income (loss):
Change in unrealized gain (loss) on investments, net of tax	(654)	7	509	130
Other comprehensive income (loss)	(654)	7	509	130
Comprehensive loss	$ (27,122)	$ (40,846)	$ (84,840)	$ (77,543)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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