Consolidated Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 3,747,210	$ 8,995,571
Cash restricted pursuant to letters of credit	407,463	250,000
Accounts receivable		37,065
Stock subscriptions receivable		6,667
Current portion of deferred financing costs	968,004	100,458
Prepaid expenses and other current assets	75,626	173,750
Total current assets	5,198,303	9,563,511
Property and Equipment, at cost:
Computer equipment	367,854	298,290
Office and laboratory equipment (including assets under capitalized leases)	732,296	624,817
Furniture and fixtures	728,269	186,837
Manufacturing equipment	156,435	156,435
Leasehold improvements	818,939	187,264
Property and equipment, at cost	2,803,793	1,453,643
Less-Accumulated depreciation and amortization	(1,165,398)	(1,135,912)
Net property and equipment (including assets under capitalized leases)	1,638,395	317,731
Other Assets:
Restricted cash	9,740	19,739
Intangible assets, net of accumulated amortization	9,625,000	9,625,000
Deferred financing costs	3,549,328
Other assets	826	826
Total other assets	13,184,894	9,645,565
Total assets	20,021,592	19,526,807
Current Liabilities:
Accounts payable	2,319,219	365,298
Deferred revenue from licensing agreements	90,228	123,708
Current portion of capital lease obligation	2,527	2,288
Derivative warrant liability	5,585,141	1,035,337
Accrued expenses and other liabilities	1,581,448	965,832
Total current liabilities	9,578,563	2,492,463
Capital lease obligation, net of current portion	1,361	3,888
Note payable, net of discount	120,834
Deferred revenue from licensing arrangements, net of current portion	90,228	61,867
Total liabilities	9,790,986	2,558,218
Series C, $0.01 par value, authorized 10,000 shares, issued and outstanding 9,974.185 at December 31, 2012 and 2011	100	100
Series D, $0.01 par value, authorized 3,600,000 shares, issued and outstanding 3,006,000 at December 31, 2012 and 2011 (preference in liquidation of $3,006,000)	30,060	30,060
Common stock, $0.01 par value, authorized 150,000 shares, issued and outstanding 44,373,461 and 38,543,944 shares at December 31, 2012 and 2011, respectively	443,737	385,442
Additional paid-in capital	103,658,724	98,116,327
Common stock subscribed for but not paid for or issued, 33,333 shares at December 31, 2011		6,667
Accumulated deficit	(93,902,015)	(81,570,007)
Total stockholders' equity	10,230,606	16,968,589
Total liabilities and stockholders' equity	$ 20,021,592	$ 19,526,807