CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss attributable to the Company	$ (65,217)	$ (9,401)	$ (37,432)	$ (18,036)	$ (17,822)	$ (17,338)	$ (30,547)	$ (46,833)	$ (47,885)	$ (112,050)	$ (65,707)	$ (596,155)	$ (83,743)	$ (85,608)
Other comprehensive gain (loss) - foreign currency translation adjustment	687	107	(236)	296	(531)	86	(210)	(129)	(124)	558	(655)	1,163	(296)	(610)
Comprehensive loss attributable to the Company	(64,530)	(9,294)	(37,668)	(17,740)	(18,353)	(17,252)	(30,757)	(46,962)	(48,009)	(111,492)	(66,362)	(594,992)	(84,039)	(86,218)
Preferred stock dividends declared, deemed dividends and accretion of discount		(13)	(13)	(1,241)	(544)	(13)	(13)	(26)	(26)	(26)	(570)	(26)	(1,812)	(52)
Comprehensive loss attributable to common stockholders	$ (64,530)	$ (9,307)	$ (37,681)	$ (18,981)	$ (18,897)	$ (17,265)	$ (30,770)	$ (46,988)	$ (48,035)	$ (111,518)	$ (66,932)	$ (595,018)	$ (85,851)	$ (86,270)