Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows From Operating Activities:
Net loss	$ (12,332,008)	$ (10,029,591)	$ (4,146,796)
Depreciation and amortization	145,155	47,916	109,413
Share-based compensation, net	1,409,562	836,866	164,810
Fair value of common stock issued as charitable contribution			113,400
Fair value of common stock and warrants issued for services	153,464	448,940	935,144
Fair value of options issued for services			59,471
(Gain) loss on revaluation of derivative warrant liability	(3,683,676)	1,762,938	(371,345)
Non-cash (gain) loss on extinguishment of debt		1,514	(183,863)
Non-cash interest expense		12,159	35,190
Non-cash loss on disposal of assets	21,272	5,688
Non-cash debt financing costs	455,000
Cash received from lessor as a lease incentive	236,974
Amortization of discount on note payable	120,834
Amortization of non-cash deferred financing costs	423,126
Accounts receivable	37,065	104,423	(11,452)
Prepaid expenses and other current assets	98,124	(79,003)	31,436
Deposits and other assets	9,999	(576)	1,750
Accounts payable	1,953,921	(240,336)	(320,078)
Deferred revenue from licensing arrangements	(5,119)	(302,059)	(225,868)
Accrued expenses and other liabilities	668,642	505,184	178,969
Net cash used in operating activities	(10,287,665)	(6,925,937)	(3,629,819)
Cash Flows from Investing Activities:
Purchase of furniture, equipment and leasehold improvements	(1,487,091)	(323,301)	(14,415)
Decrease (increase) in restricted cash	(157,463)	5,510	(265,500)
Net cash used in investing activities	(1,644,554)	(317,791)	(279,915)
Cash Flows From Financing Activities:
Proceeds from Platinum note payable	3,000,000
Proceeds from the exercise of warrants	212,018	4,919,346
Proceeds from issuance of common stock and warrants, net of expenses	3,278,869	6,439,489	3,886,794
Principal payments for capital lease obligations	(2,288)	(2,071)	(1,874)
Proceeds from issuance of Series D Convertible Preferred Stock and warrants, net of expenses		2,478,701
Proceeds from bridge notes		1,000,000	250,000
Repayment of bridge notes		(75,000)	(50,000)
Proceeds from exercise of stock options	195,259	136,790
Net cash provided by financing activities	6,683,858	14,897,255	4,084,920
Net increase (decrease) in cash and cash equivalents	(5,248,361)	7,653,527	175,186
Cash and cash equivalents, beginning of period	8,995,571	1,342,044	1,166,858
Cash and cash equivalents, end of period	3,747,210	8,995,571	1,342,044
Supplemental Disclosure of Cash Flow Information and Non Cash Financing Transactions:
Cash paid for interest	515	1,768	2,124
Accretion of dividend on Series B Perpetual Redeemable Preferred Stock		157,733	131,659
Deemed dividend on beneficial conversion of Series D Convertible Preferred Stock		1,975,211
Issuance of common stock in settlement of short term note		35,500	100,000
Issuance of common stock in settlement of accounts payable			23,000
Issuance of common stock in connection with issuance of promissory notes			48,500
Conversion of notes payable and accrued interest into Series D Convertible Preferred Stock		1,006,000
Conversion of Series D Convertible Preferred Stock into Common Stock		500,000
Redemption of Series B Perpetual Redeemable Preferred Stock for Series C Preferred Stock in connection with October 27, 2011 warrant exercises		1,701,672
Reclassification of derivative warrant liability to additional paid-in capital	61,520	2,272,597	200,357
Fair value of warrants included in stock issuance costs		41,363	468,741
Common stock subscription receivable		6,667	285,000
Fair value of common stock issued in connection with settlement agreement	(82,000)	290,000
Cancellation of restricted common stock		5,250
Deemed dividend on repricing of warrants		4,559,761
Fair value of Commitment Warrant issued in connection with debt financing	4,840,000
Fair value of Draw Warrant issued for note payable recorded as discount	3,000,000
Fair value Draw Warrant issued for note payable recorded as debt financing costs	$ 455,000