CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - 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
Increase (Decrease) in Shareholders' Equity
Net Loss		(5,549,521)		(5,549,521)
Unrealized Loss on Available-for-Sale Debt Instrument Investments			(189,995)	(189,995)
Foreign Currency Translation Adjustments			(2,485)	(2,485)
Stock-based compensation	$ 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
Balance at Dec. 31, 2018	$ 299,601,960	(272,388,234)	63,148	$ 27,276,874
Balance (in shares) at Dec. 31, 2018	57,034,154			57,034,154
Increase (Decrease) in Shareholders' Equity
Net Loss		(8,678,347)		$ (8,678,347)
Unrealized Loss on Available-for-Sale Debt Instrument Investments			(7,161)	(7,161)
Foreign Currency Translation Adjustments			(92)	(92)
Exercise of Employee Stock Option	$ 147,900			$ 147,900
Exercise of Employee Stock Option (in shares)	30,000			30,000
Delivery of common stock underlying restricted stock units, net of tax	$ (95,429)			$ (95,429)
Delivery of common stock underlying restricted stock units, net of tax (in shares)	64,173
Stock-based compensation	$ 1,517,302			1,517,302
Balance at Mar. 31, 2019	$ 301,171,733	$ (281,066,581)	$ 55,895	$ 20,161,047
Balance (in shares) at Mar. 31, 2019	57,128,327			57,128,327