Consolidated Statement of Stockholders' Equity (unaudited) - 6 months ended Jun. 30, 2018 - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2017	$ 80,963,812	$ 102,549	$ 207,421,710	$ (126,560,447)
Issuance of common stock, net	10,549	3	10,546
Issuance of stock options for services	1,747,850		1,747,850
Exercise of stock options for common stock	41,532	47	41,485
Other comprehensive loss	(36,498)				$ (36,498)
Net loss	(11,665,032)			(11,665,032)
Ending Balance at Jun. 30, 2018	$ 71,062,213	$ 102,599	$ 209,221,591	$ (138,225,479)	$ (36,498)