Consolidated Statements Of Changes In Shareholders' Equity - USD ($)	COMMON SHARES	ACCUMULATED DEFICIT	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	Total
Balance at Dec. 31, 2014	$ 249,018,189	$ (180,117,726)	$ (197,669)	$ 68,702,794
Balance (in shares) at Dec. 31, 2014	50,284,007
Increase (Decrease) in Shareholders' Equity
Net Loss		(14,420,450)		(14,420,450)
Unrealized Gain (Loss) on Available-For-Sale Securities			(717,827)	(717,827)
Issuance of Common Shares	$ 4,132,250			4,132,250
Issuance of Common Shares (in shares)	1,644,248
Stock Option Based Expense	$ 5,193,481			5,193,481
Stock Tendered in Satisfaction of Tax Liabilities	$ (4,264,922)			(4,264,922)
Stock Tendered in Satisfaction of Tax Liabilities (in shares)	(426,378)
Restricted Stock Amortization	$ 3,694,496			3,694,496
Balance at Dec. 31, 2015	$ 257,773,494	(194,538,176)	(915,496)	$ 62,319,822
Balance (in shares) at Dec. 31, 2015	51,501,877			51,501,877
Increase (Decrease) in Shareholders' Equity
Net Loss		(19,802,916)		$ (19,802,916)
Unrealized Gain (Loss) on Available-For-Sale Securities			13,619	13,619
Foreign Currency Translation Adjustments			(671)	(671)
Issuance of Common Shares	$ 80,161			80,161
Issuance of Common Shares (in shares)	25,834
Stock Option Based Expense	$ 5,984,524			5,984,524
Restricted Stock Amortization	4,361,760			4,361,760
Balance at Dec. 31, 2016	$ 268,199,939	(214,341,092)	(902,548)	$ 52,956,299
Balance (in shares) at Dec. 31, 2016	51,527,711			51,527,711
Increase (Decrease) in Shareholders' Equity
Net Loss		(25,921,284)		$ (25,921,284)
Unrealized Gain (Loss) on Available-For-Sale Securities			866,031	866,031
Foreign Currency Translation Adjustments			1,134	1,134
Issuance of Common Shares	$ 123,603			123,603
Issuance of Common Shares (in shares)	508,384
Shares Issued in Exchange for Services	$ 228,847			228,847
Shares Issued in Exchange for Services (in shares)	50,000
Stock Option Based Expense	$ 3,858,502			3,858,502
Stock Tendered in Satisfaction of Tax Liabilities	$ (2,287,231)			(2,287,231)
Stock Tendered in Satisfaction of Tax Liabilities (in shares)	(317,671)
Restricted Stock Amortization	$ 3,087,247			3,087,247
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