Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (43,796,685)	$ (223,522,435)	$ (148,296,965)
Total other comprehensive income/(loss)	0	0	0
Comprehensive loss	$ (43,796,685)	$ (223,522,435)	$ (148,296,965)