Equity - Warranty Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Class Of Warrant Or Right [Roll Forward]
Class of warrant or right, outstanding, beginning balance (in shares)	31,426,248
Exercises	(16,585,148)
Class of warrant or right, outstanding, ending balance (in shares)	14,841,100
Class Of Warrant Or Right Weighted Average Exercise Price [Roll Forward]
Exercise price, beginning balance (in dollars per share) | $ / shares	$ 1.12
Exercises (in dollars per share) | $ / shares	0.73
Exercise price, ending balance (in dollars per share) | $ / shares	$ 1.56
Warrant
Class Of Warrant Or Right [Roll Forward]
Class of warrant or right, outstanding, beginning balance (in shares)	8,437,747
Exercises	(8,342,128)
Class of warrant or right, outstanding, ending balance (in shares)	95,619
Warrant
Class Of Warrant Or Right [Roll Forward]
Class of warrant or right, outstanding, beginning balance (in shares)	22,988,501
Exercises	(8,243,020)
Class of warrant or right, outstanding, ending balance (in shares)	14,745,481