Warrant or Right (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Class of Warrant or Right [Line Items]
Warrant liability	$ 210,319	$ 383,073
Amazon Warrant C [Member] [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	13,900
Class of Warrant or Right, Unissued	900
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 21.53
Warrant liability	$ (210,300)	$ (383,100)
Amazon Warrant AB [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	14,900
Class of Warrant or Right, Unissued	0
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 9.73
Amazon Warrant Subsequent
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	600
Class of Warrant or Right, Unissued	6,400
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 20.40