Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES:
Royalties	$ 1,783,271	$ 1,080,233	$ 4,895,454	$ 2,549,945
Research and development, net	(18,407)	121,850	(44,672)	927,950
License fees	0	6,000,000	3,000,000	10,000,000
Total revenues	1,764,864	7,202,083	7,850,782	13,477,895
COSTS AND EXPENSES:
Cost of royalty revenues	89,295	54,014	246,280	127,499
Research and development	3,705,365	4,170,751	10,180,271	9,965,847
General and administrative	2,723,235	2,846,950	8,475,392	8,317,741
Total costs and expenses	6,517,895	7,071,715	18,901,943	18,411,087
(Loss)/income from operations	(4,753,031)	130,368	(11,051,161)	(4,933,192)
OTHER EXPENSE:
Interest income	38,881	39,024	129,120	117,585
Interest expense	(933,903)	(964,543)	(2,834,609)	(2,870,087)
Change in fair value of warrant liability	67,910	(1,072,687)	716,786	(438,286)
Total other expense	(827,112)	(1,998,206)	(1,988,703)	(3,190,788)
Net loss	(5,580,143)	(1,867,838)	(13,039,864)	(8,123,980)
Net loss per common share (basic and diluted)	$ (0.06)	$ (0.02)	$ (0.15)	$ (0.10)
Weighted average common shares (basic and diluted)	86,004,857	82,456,708	85,962,415	81,235,922
Total comprehensive loss	$ (5,584,080)	$ (1,862,631)	$ (13,029,416)	$ (8,125,013)