Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 6,068,469	$ 3,747,210
Cash restricted pursuant to letters of credit	657,463	407,463
Deferred financing costs, current portion	968,004	968,004
Prepaid expenses and other current assets	127,110	75,626
Total current assets	7,821,046	5,198,303
Property and Equipment, at cost:
Computer equipment	323,489	367,854
Office and laboratory equipment (including assets under capitalized leases)	716,531	732,296
Furniture and fixtures	755,444	728,269
Manufacturing equipment	111,980	156,435
Leasehold improvements	825,589	818,939
Property and equipment, at cost	2,733,033	2,803,793
Less-Accumulated depreciation and amortization	(1,146,135)	(1,165,398)
Net property and equipment (including assets under capitalized leases)	1,586,898	1,638,395
Other Assets:
Intangible assets, net of accumulated amortization	9,625,000	9,625,000
Deferred financing costs, net of current portion	2,823,325	3,549,328
Other assets	12,066	10,566
Total other assets	12,460,391	13,184,894
Total assets	21,868,335	20,021,592
Current Liabilities:
Accounts payable	1,551,092	2,319,219
Deferred revenue from licensing arrangements, current portion	90,228	90,228
Capital lease obligation, current portion	2,017	2,527
Derivative warrant liability	979,155	5,585,141
Accrued expenses and other current liabilities	1,595,920	1,581,448
Total current liabilities	4,218,412	9,578,563
Capital lease obligation, net of current portion		1,361
Note payable, net of discount		120,834
Deferred revenue from licensing arrangements, net of current portion	22,557	90,228
Total liabilities	4,240,969	9,790,986
Convertible Preferred Stock:
Series C, $0.01 par value, authorized 10,000 shares, issued and outstanding 9,974.185 shares at September 30, 2013 and December 31, 2012	100	100
Series D, $0.01 par value, authorized 3,600,000 shares, issued and outstanding 3,006,000 shares at September 30, 2013 and December 31, 2012 (preference in liquidation of $3,006,000)	30,060	30,060
Common Stock, $0.01 par value, authorized 150,000,000 shares, issued and outstanding 10,699,990 and 4,437,346 shares at September 30, 2013 and December 31, 2012, respectively	107,003	44,374
Additional paid-in capital	126,958,986	104,058,087
Accumulated deficit	(109,468,783)	(93,902,015)
Total stockholders' equity	17,627,366	10,230,606
Total liabilities and stockholders' equity	$ 21,868,335	$ 20,021,592