Statement of Change in Stockholders Equity (USD $)	Series A Redeemable Convertible Preferred Stock [Member] Additional Paid-in Capital [Member]	Series A Redeemable Convertible Preferred Stock [Member]	Direct And Private Placement [Member] Common Stock [Member]	Direct And Private Placement [Member] Additional Paid-in Capital [Member]	Direct And Private Placement [Member]	Preferred Stock [Member] Prefered Stock [Member]	Preferred Stock [Member]	Common Stock [Member] Shares Issued Under CEFF Net Of Issuance Costs [Member]	Common Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member] Prefered Stock [Member]	Common Stock [Member] Common Stock Warrant [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Shares Issued Under CEFF Net Of Issuance Costs [Member]	Additional Paid-in Capital [Member] Series A Preferred Stock [Member]	Additional Paid-in Capital [Member] Prefered Stock [Member]	Additional Paid-in Capital [Member] Common Stock Warrant [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Warrant [Member]	Shares Issued Under CEFF Net Of Issuance Costs [Member]	Series A Preferred Stock [Member]	Common Stock Warrant [Member]	Total
Balance at Dec. 31, 2010												$ 31,314					$ 99,426,459	$ (3,076,670)	$ (18,367)	$ (100,938,261)					$ (4,575,525)
Balance (in Shares) at Dec. 31, 2010												2,962,465						168,949
Net loss																				(23,222,678)					(23,222,678)
Unrealized gain loss on investments available for sale																			(258,333)						(258,333)
Valuation of stock	2,030,000	2,030,000															5,386,518			(5,386,518)
Shares issued under CEFF, net of issuance costs								2,979					3,113,108									3,116,087
Shares issued under CEFF, net of issuance costs (in Shares)								297,892
Registered Direct common stock offering			35,843	44,668,694	44,704,537
Registered Direct common stock offering (in Shares)			3,584,306
Conversion of common stock warrants									4,630			348		2,626,717			427,988				428,337		2,631,347
Conversion of common stock warrants (in Shares)									462,960			34,859
Stock-based compensation expense																	1,207,886								1,207,886
Issuance of common stock out of treasury												217					(217)
Issuance of common stock out of treasury (in Shares)												21,692
Issuance of common stock out of treasury																	249	192,545		(60,884)					131,910
Issuance of common stock out of treasury (in Shares)												10,565						(10,565)
Balance at Dec. 31, 2011												75,332					158,887,402	(2,884,125)	(276,700)	(129,608,341)					26,193,568
Balance (in Shares) at Dec. 31, 2011												7,374,739						158,384							704,113
Net loss																				(26,568,382)					(26,568,382)
Unrealized gain loss on investments available for sale																			150,093						150,093
Valuation of stock	73,654	73,654
Conversion of common stock warrants									8,455					10,156,437									10,164,892
Conversion of common stock warrants (in Shares)									845,526
Stock-based compensation expense																	1,143,764								1,143,764
Issuance of common stock out of treasury												586					696,643								697,220
Issuance of common stock out of treasury (in Shares)												58,618
Issuance of common stock out of treasury																		193,614		(86,565)					107,049
Issuance of common stock out of treasury (in Shares)												10,624						(10,624)
Balance at Dec. 31, 2012												84,373					170,957,891	(2,690,511)	(126,607)	(156,263,288)					11,961,858
Balance (in Shares) at Dec. 31, 2012												8,289,507						147,760							729,825
Net loss																				(8,251,358)					(8,251,358)
Unrealized gain loss on investments available for sale																			82,441						82,441
Valuation of stock	521,763	521,764
Registered Direct common stock offering			25,880	15,598,670	15,624,550		150										18,217,702								18,217,852
Registered Direct common stock offering (in Shares)			2,588,032				15,001
Conversion of common stock warrants						(150)				26,828	180				(26,678)	261,764								261,944
Conversion of common stock warrants (in Shares)						(15,001)				2,682,759	18,021
Stock-based compensation expense																	1,235,437								1,235,437
Issuance of common stock out of treasury												129					183,918								184,047
Issuance of common stock out of treasury (in Shares)												12,872
Issuance of common stock out of treasury												98,046						269,147		(171,101)
Issuance of common stock out of treasury (in Shares)												14,765						(14,765)
Non-cash dividend on beneficial conversion feature associated with the preferred stock offering																				(4,601,410)					(4,601,410)
Classification of warrants to/from common stock warrant liability, net																	(3,809,730)								(3,809,730)
Fractional share payment												(10)					(1,595)								(1,605)
Fractional share payment (in Shares)												(981)
Balance at Dec. 31, 2013												$ 137,380					$ 203,139,142	$ (2,421,364)	$ (44,166)	$ (169,287,157)					$ 31,523,835
Balance (in Shares) at Dec. 31, 2013												13,604,975						132,995							863.462