Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (4,735,917)	$ (7,656,110)
Foreign currency translation adjustment	4,341	(4,697)
Comprehensive loss	$ (4,731,576)	$ (7,660,807)