Condensed Consolidated Statements Of Changes In Shareholders' Equity - 9 months ended Sep. 30, 2018 - USD ($)	COMMON SHARES	ACCUMULATED DEFICIT	ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)	Total
Balance at Dec. 31, 2017	$ 273,210,907	$ (240,262,376)	$ (35,383)	$ 32,913,148
Balance (in shares) at Dec. 31, 2017	51,768,424			51,768,424
Increase (Decrease) in Shareholders' Equity
Net Loss		(22,749,945)		$ (22,749,945)
Unrealized Gain (Loss) on Available-for-Sale Investments			96,327	96,327
Foreign Currency Translation Adjustments			(13,791)	(13,791)
Exercise of Employee Stock Option, Net of Tax	$ (1,978)			(1,978)
Exercise of Employee Stock Option, Net of Tax (in shares)	870
Stock-based compensation	$ 2,425,919			2,425,919
Balance at Sep. 30, 2018	$ 275,634,848	$ (263,012,321)	$ 47,153	$ 12,669,680
Balance (in shares) at Sep. 30, 2018	51,769,294			51,769,294