CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statement - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,045,811)	$ (10,202,278)	$ (18,045,348)	$ (20,464,796)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation loss	(9,543)	(1,145)	(11,942)	(1,796)
Unrealized gain or reversal of previous losses on securities available-for-sale	9,519	5,132	9,065	5,132
Total other comprehensive income (loss)	(24)	3,987	(2,877)	3,336
Total comprehensive loss	(8,045,835)	(10,198,291)	(18,048,225)	(20,461,460)
Preferred stock dividend	6,060	6,060	12,120	12,120
Comprehensive loss attributable to common stockholders	$ (8,051,895)	$ (10,204,351)	$ (18,060,345)	$ (20,473,580)