Stockholders' Equity (Details Textual) (USD $)	1 Months Ended												12 Months Ended											141 Months Ended		12 Months Ended					1 Months Ended		12 Months Ended													1 Months Ended	3 Months Ended	12 Months Ended				9 Months Ended		12 Months Ended																		12 Months Ended
	Nov. 30, 2013	Jan. 31, 2012	Feb. 28, 2011	Oct. 31, 2010	Sep. 30, 2010	Mar. 31, 2010	Jul. 31, 2009	Nov. 30, 2007	Mar. 31, 2007	Jan. 31, 2007	Feb. 28, 2006	Feb. 28, 2005	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Dec. 31, 2006	Dec. 31, 2005	Dec. 31, 2004	Dec. 31, 2002	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013 Executive Officer [Member]	Dec. 31, 2012 Executive Officer [Member]	Dec. 31, 2011 Executive Officer [Member]	Dec. 31, 2013 Non Employee Directors [Member]	Dec. 31, 2005 Facilitation Of Merger [Member]	May 31, 2006 Finders Agreement [Member]	Mar. 31, 2010 Offering 2010 [Member]	Dec. 31, 2007 Placement 2007 [Member]	Dec. 31, 2006 Placement 2006 [Member]	Dec. 31, 2006 Placement 2006 [Member] Finders Agreement [Member]	Dec. 31, 2004 Placement 2004 [Member]	Dec. 31, 2006 Placement Agent [Member] Placement 2006 [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2010 Common Stock [Member] Cash Exercises One [Member]	Dec. 31, 2011 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2010 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2009 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2008 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2007 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2006 Common Stock [Member] Cashless Exercises [Member]	Dec. 31, 2011 Common Stock [Member] Cash Exercise [Member]	Mar. 31, 2011 Common Stock [Member] Cash Exercise [Member]	Dec. 31, 2012 Common Stock [Member] Cash Exercise [Member]	Dec. 31, 2008 Common Stock [Member] Cash Exercise [Member]	Dec. 31, 2007 Common Stock [Member] Cash Exercise [Member]	Dec. 31, 2010 Common Stock [Member] Cashless Exercises One [Member]	Dec. 31, 2002 Common Stock [Member] Founders [Member]	Dec. 31, 2002 Unpaid Subscription On Common Stock [Member]	Dec. 31, 2004 Unpaid Subscription On Common Stock [Member]	Dec. 31, 2010 March [Member]	Dec. 31, 2007 March [Member]	Dec. 31, 2004 March [Member] License Fee [Member]	Dec. 31, 2010 March [Member] Common Stock [Member]	Dec. 31, 2007 March [Member] Common Stock [Member]	Dec. 31, 2004 March [Member] Common Stock [Member] License Fee [Member]	Dec. 31, 2008 April [Member]	Dec. 31, 2007 April [Member] License Fee [Member]	Dec. 31, 2004 April [Member] Chief Executive [Member]	Dec. 31, 2008 April [Member] Common Stock [Member]	Dec. 31, 2007 April [Member] Common Stock [Member] License Fee [Member]	Dec. 31, 2004 April [Member] Common Stock [Member] Chief Executive [Member]	Dec. 31, 2006 May [Member]	Dec. 31, 2006 May [Member] License Fee [Member]	Dec. 31, 2006 May [Member] Common Stock [Member] License Fee [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2013 Stock Option [Member]	Dec. 31, 2012 Stock Option [Member]	Dec. 31, 2013 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Shares Authorized													5,000,000	5,000,000										5,000,000
Stock Issued During Period, Shares, New Issues	7,666,667	4,989,275	10,062,500	8,214,286	634,500	6,700,000	3,325,000	7,388,172	2,648,306				3,609,595							7,166,666		5,532,994																1,993,444														5,428,217						6,700,000	2,648,306	471,816				30,612	26,643	478,330			63,131
Equity Issuance Dollar Amount Per Share																																																														$ 5.63		$ 4.90			$ 4.35
Stock Issued During Period, Value, New Issues															$ 8,372,464								$ 4,625															$ 199																	$ 16,762,923	$ 11,476,677	$ 402	$ 670	$ 265		$ 150,000	$ 150,000	$ 408	$ 3				$ 274,621
Warrants Issued To Purchase Common Stock, Shares						2,345,000			794,492		716,666		1,286,764							2,149,999		483,701								105,516	250,000	2,345,000	794,492	2,149,999		483,701	716,666
Receipt Of Cash For Stock Subscription Receivable																						4,625																															4,625	4,625
Warrant Fair Value						3,900,000			1,300,000		700,000									1,100,000		14,000								26,700	433,750	3,900,000	1,300,000	1,100,000	705,000	14,000
Warrants Exercised During Period																																		2,131,399					65,555	331,245	26,379	119,691	100,487	116,596	30,422	37,277	1,993,444	57,000	11,200	61,200	1,058,236
Warrants Exercise Price																														$ 2.62	$ 4.31	$ 2.79	$ 5.66			$ 2.88	$ 3.30		$ 4.20	$ 2.89	$ 2.62	$ 3.27	$ 2.91	$ 2.90	$ 2.89	$ 2.89	$ 4.20	$ 3.30	$ 4.20	$ 4.20	$ 2.79
Warrant Description																																	The warrants were redeemable at par value at the Companys option in the event that the volume weighted-average closing price of the Companys common stock is greater than $12.00 per share for any 20 consecutive trading days provided the Company gives 60 business days	The warrants permitted the holders to purchase the underlying common shares at $4.20 each and were exercisable in whole at any time, or in part from time to time, for cash, for five years from the date of issuance. In addition, these warrants were redeemable at the Companys option in the event that the volume weighted average closing bid price of its common stock for any 20 consecutive trading days was at least $9.00 per share.
Unexercised Warrants																																		18,600
Percentage Of Purchase Price Per Share On Exercise Price																																				110.00%	110.00%
Debt Instrument, Convertible, Conversion Price																																				$ 2.89
Stock Issued To Warrant Holders																																								149,950	14,298	63,927	57,983	68,136	15,461			17,148			661,930
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price													$ 3.52	$ 3.97	$ 4.32									$ 3.52
Class of Warrant or Right, Exercise Price of Warrants or Rights																																																																						4.31	2.79
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights													Each option granted to employees and non-employee directors during 2013, 2012 and 2011, other than those granted to non-employee directors on April 15, 2013 more fully described above, vests as to 25% of the shares on each of the first, second, third and fourth anniversary of the vesting commencement date.																vest only upon a change of control of the Company
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period																										822,986	837,150	40,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value																																																																								49,900	44,900
Proceeds From Warrant Exercises													$ 0	$ 0	$ 8,480,135									$ 9,054,546															$ 275,000	$ 100,000							$ 8,400,000		$ 47,040	$ 252,040
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross													985,500	2,136,000	1,190,500	861,000	938,290	837,500	665,500	668,085	761,451	363,835							200,000																																													10,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date																													Dec. 31, 2014
Shares Authorized													205,000,000											205,000,000	105,000,000
Common Stock, Shares Authorized													200,000,000	100,000,000										200,000,000	100,000,000