Consolidated Statements Of Changes In Stockholders' Equity (USD $)	February [Member] Common Stock [Member] USD ($)	February [Member] Additional Paid-In capital [Member] USD ($)	February [Member] USD ($)	March [Member] License Fee [Member] Common Stock [Member] USD ($)	March [Member] License Fee [Member] Additional Paid-In capital [Member] USD ($)	March [Member] License Fee [Member] USD ($)	March [Member] Common Stock [Member] USD ($)	March [Member] Additional Paid-In capital [Member] USD ($)	March [Member] USD ($)	April [Member] Founders [Member] Common Stock [Member]	April [Member] Founders [Member] Additional Paid-In capital [Member]	April [Member] Founders [Member] Unpaid Subscription On Common Stock [Member]	April [Member] License Fee [Member] Common Stock [Member] USD ($)	April [Member] License Fee [Member] Additional Paid-In capital [Member] USD ($)	April [Member] License Fee [Member] USD ($)	April [Member] Chief Executive [Member] Common Stock [Member] USD ($)	April [Member] Chief Executive [Member] Additional Paid-In capital [Member] USD ($)	April [Member] Chief Executive [Member] USD ($)	April [Member] Common Stock [Member] USD ($)	April [Member] Additional Paid-In capital [Member] USD ($)	April [Member] USD ($)	May [Member] License Fee [Member] Common Stock [Member] USD ($)	May [Member] License Fee [Member] Additional Paid-In capital [Member] USD ($)	May [Member] License Fee [Member] USD ($)	May [Member] Additional Paid-In capital [Member] USD ($)	May [Member] USD ($)	June [Member] Exercise Of Common Stock Warrants [Member] Common Stock [Member] USD ($)	June [Member] Exercise Of Common Stock Warrants [Member] Additional Paid-In capital [Member] USD ($)	June [Member] Exercise Of Common Stock Warrants [Member] USD ($)	July [Member] Common Stock [Member] USD ($)	July [Member] Additional Paid-In capital [Member] USD ($)	July [Member] USD ($)	September [Member] Common Stock [Member] USD ($)	September [Member] Additional Paid-In capital [Member] USD ($)	September [Member] USD ($)	October [Member] Exercise Of Common Stock Warrants [Member] Common Stock [Member]	October [Member] Exercise Of Common Stock Warrants [Member] Additional Paid-In capital [Member] USD ($)	October [Member] Exercise Of Common Stock Warrants [Member] USD ($)	October [Member] Common Stock [Member] USD ($)	October [Member] Additional Paid-In capital [Member] USD ($)	October [Member] USD ($)	November [Member] Common Stock [Member] USD ($)	November [Member] Additional Paid-In capital [Member] USD ($)	November [Member] USD ($)	December [Member] Common Stock [Member] USD ($)	December [Member] Additional Paid-In capital [Member] USD ($)	December [Member] USD ($)	Exercise Of Common Stock Warrants [Member] Common Stock [Member] USD ($)	Exercise Of Common Stock Warrants [Member] Additional Paid-In capital [Member] USD ($)	Exercise Of Common Stock Warrants [Member] USD ($)	Common Stock [Member] USD ($)	Additional Paid-In capital [Member] USD ($)	Unpaid Subscription On Common Stock [Member] USD ($)	Deferred Stock-Based Compensation [Member] USD ($)	Deficit Accumulated During The Development Stage [Member] USD ($)	Total USD ($)
Balance at Dec. 31, 2003																																																			$ 542	$ 4,083	$ (4,625)
Balance, shares at Dec. 31, 2003																																																			5,428,217
Common stock issued during period				47	355	402										48	360	408																											554	13,550,255	13,550,809
Common stock issued during period, shares				471,816												478,330																													5,532,994
Receipt of cash for stock subscription receivable																																																					4,625			4,625
Deferred stock-based compensation																																																				33,525		(33,525)
Amortization of deferred stock-based compensation																																																						1,529		1,529
Net loss																																																							(3,016,559)	(3,016,559)
Balance at Dec. 31, 2004																																																			1,191	13,588,578		(31,996)	(3,016,559)	10,541,214
Balance, shares at Dec. 31, 2004																																																			11,911,357
Recapitalization of the Company (See Note 1)																																																			46	(400,046)				(400,000)
Recapitalization of the Company (See Note 1), shares																																																			457,168
Employee stock options exercised																																																			1	998				999
Employee stock options exercised, shares																																																			14,663
Adoption of SFAS 123R																																																				(31,996)		31,996
Amortization of deferred stock-based compensation																																																				99,319				99,319
Variable accounting for stock options granted to third party																																																				58,594				58,594
Net loss																																																							(7,915,722)	(7,915,722)
Balance at Dec. 31, 2005																																																			1,238	13,315,447			(10,932,281)	2,384,404
Balance, shares at Dec. 31, 2005																																																			12,383,188
Common stock issued during period	717	19,854,935	19,855,652																			6	274,615	274,621
Common stock issued during period, shares	7,166,666																					63,131
Common stock issued cashless							2	(2)
Common stock issued cashless, shares							15,461
Employee stock options exercised																																																			8	5,072				5,080
Employee stock options exercised, shares																																																			78,683
Variable accounting for stock options granted to third party																																																				4,192				4,192
Stock-based compensation																																																				283,983				283,983
Net loss																																																							(8,671,376)	(8,671,376)
Balance at Dec. 31, 2006																																																			1,971	33,738,242			(19,603,657)	14,136,556
Balance, shares at Dec. 31, 2006																																																			19,707,129
Common stock issued during period							265	11,476,412	11,476,677				3	149,997	150,000												6	246,994	247,000								5,040	5,040				739	45,754,030	45,754,769
Common stock issued during period, shares							2,648,306						26,643														60,000									1,200						7,388,172
Common stock issued cashless																																																			6	(6)
Common stock issued cashless, shares																																																			68,136
Fair value of warrants issued in May 2006 in consideration of finders fee at approximately $1.75 per share for which vesting was conditioned on an even that occurred in January 2007																									433,750	433,750
Employee stock options exercised																																																			2	15,704				15,706
Employee stock options exercised, shares																																																			17,868
Stock-based compensation																																																				828,626				828,626
Net loss																																																							(15,081,545)	(15,081,545)
Balance at Dec. 31, 2007																																																			2,992	92,648,789			(34,685,202)	57,966,579
Balance, shares at Dec. 31, 2007																																																			29,917,454
Common stock issued during period																			3	149,997	150,000																											1	47,039	47,040
Common stock issued during period, shares																			30,612																													11,200
Common stock issued cashless																																																6	(6)
Common stock issued cashless, shares																																																57,983
Final adjustment to issuance costs accrued in conjunction with the sale and issuance of common stock																																											5,733	5,733
Employee stock options exercised																																																			9	58,935				58,944
Employee stock options exercised, shares																																																			94,230
Stock-based compensation																																																				1,405,752				1,405,752
Net loss																																																							(35,086,151)	(35,086,151)
Balance at Dec. 31, 2008																																																			3,011	94,316,239			(69,771,353)	24,547,897
Balance, shares at Dec. 31, 2008																																																			30,111,479
Common stock issued during period																														333	12,402,425	12,402,758
Common stock issued during period, shares																														3,325,000
Common stock issued cashless																																																6	(6)
Common stock issued cashless, shares																																																63,927
Stock-based compensation																																																				1,673,165				1,673,165
Net loss																																																							(25,771,914)	(25,771,914)
Balance at Dec. 31, 2009																																																			3,350	108,391,823			(95,543,267)	12,851,906
Balance, shares at Dec. 31, 2009																																																			33,500,406
Common stock issued during period							670	16,762,253	16,762,923																								63	2,851,313	2,851,376				821	37,788,721	37,789,542							7	275,324	275,331
Common stock issued during period, shares							6,700,000																										634,500						8,214,286									65,555
Common stock issued cashless																																																			68	(68)
Common stock issued cashless, shares																																																			676,228
Stock-based compensation																																																				1,986,755				1,986,755
Net loss																																																							(37,330,069)	(37,330,069)
Balance at Dec. 31, 2010																																																			4,979	168,056,121			(132,873,336)	35,187,764
Balance, shares at Dec. 31, 2010																																																			49,790,975
Common stock issued during period	1,006	37,725,532	37,726,538																																													4	107,667	107,671	199	8,372,265				8,372,464
Common stock issued during period, shares	10,062,500																																															37,277			1,993,444
Common stock issued cashless																																																15	(15)
Common stock issued cashless, shares																																																149,950
Recovery of short-swing profits, net of expenses																																																				73,797				73,797
Stock-based compensation																																																				2,648,741				2,648,741
Net loss																																																							(50,452,165)	(50,452,165)
Balance at Dec. 31, 2011																																																			$ 6,203	$ 216,984,108			$ (183,325,501)	$ 33,664,810
Balance, shares at Dec. 31, 2011																																																			62,034,146