CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Statement - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (4,786,177)	$ (9,999,537)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation loss	0	(2,399)
Unrealized gain or reversal of previous losses on securities available-for-sale	0	(454)
Total other comprehensive loss	0	(2,853)
Total comprehensive loss	(4,786,177)	(10,002,390)
Preferred stock dividend	(6,060)	(6,060)
Comprehensive loss attributable to common stockholders	$ (4,792,237)	$ (10,008,450)