Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 11,608,289	$ 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	210,321	75,626
Total current assets	13,444,077	5,198,303
Property and Equipment, at cost:
Computer equipment	312,443	367,854
Office and laboratory equipment (including assets under capitalized leases)	710,011	732,296
Furniture and fixtures	734,772	728,269
Manufacturing equipment	111,980	156,435
Leasehold improvements	836,471	818,939
Property and equipment, at cost	2,705,677	2,803,793
Less-Accumulated depreciation and amortization	(1,045,825)	(1,165,398)
Net property and equipment (including assets under capitalized leases)	1,659,852	1,638,395
Other Assets:
Intangible assets, net of accumulated amortization	9,625,000	9,625,000
Deferred financing costs, net of current portion	3,065,326	3,549,328
Other assets	11,066	10,566
Total other assets	12,701,392	13,184,894
Total assets	27,805,321	20,021,592
Current Liabilities:
Accounts payable	2,264,576	2,319,219
Deferred revenue from licensing arrangements	90,228	90,228
Capital lease obligation, current portion	2,656	2,527
Derivative warrant liability	909,155	5,585,141
Accrued expenses and other liabilities	1,769,529	1,581,448
Total current liabilities	5,036,144	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	45,114	90,228
Total liabilities	5,081,258	9,790,986
Series C, $0.01 par value, authorized 10,000 shares, issued and outstanding 9,974.185 shares at June 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 June 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 10,679,790 and 4,437,346 shares at June 30, 2013 and December 31, 2012, respectively	106,801	44,374
Additional paid-in capital	126,818,839	104,058,087
Accumulated deficit	(104,231,737)	(93,902,015)
Total stockholders' equity	22,724,063	10,230,606
Total liabilities and stockholders' equity	$ 27,805,321	$ 20,021,592