Condensed Consolidated Statements Of Changes In Shareholders' Equity - 3 months ended Mar. 31, 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		(5,549,521)		$ (5,549,521)
Unrealized (Loss) on Available-for-Sale Investments			(189,995)	(189,995)
Foreign Currency Rate Changes			(2,485)	(2,485)
Stock-Based Compensation Expense	$ 446,003			446,003
Balance at Mar. 31, 2018	$ 273,656,910	$ (245,811,897)	$ (227,863)	$ 27,617,150
Balance (in shares) at Mar. 31, 2018	51,768,424			51,768,424