CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $)	3 Months Ended		181 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Revenues:
Grant revenue		$ 200,400	$ 12,963,100
Collaboration revenue			2,283,600
Other			1,123,500
Total revenues		200,400	16,370,200
Operating expenses:
Research and development	695,500	866,300	30,251,200
Acquired in-process research and development			7,523,200
General and administrative	604,600	1,055,300	31,285,700
Total operating expenses	1,300,100	1,921,600	69,060,100
Loss from operations	(1,300,100)	(1,721,200)	(52,689,900)
Other expenses, net:
Interest expense, net	(316,400)	(102,800)	(10,678,600)
Change in put and note extension option and warrant liabilities	1,804,900		587,600
Loss on early extinguishment of debt			(4,761,300)
Other income			81,900
Income (loss) before income taxes	188,400	(1,824,000)	(67,460,300)
Income taxes	(2,700)	(1,900)	(23,200)
Net income (loss)	185,700	(1,825,900)	(67,483,500)
Basic net income (loss) per share	$ 0.01	$ (0.11)
Diluted net loss per share	$ (0.02)	$ (0.11)
Basic net income (loss) per share	20,839,941	16,842,655
Diluted net loss per share	21,229,190	16,842,655
Comprehensive loss	$ 185,700	$ (1,825,900)	$ (67,483,500)