Nature of Business and Plan of Operations (Details) (USD $)	3 Months Ended								12 Months Ended			396 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2011
Nature of Business and Plan of Operations
Net loss	$ (26,499,000)	$ (37,452,000)	$ 3,813,000	$ (11,226,000)	$ (21,875,000)	$ (1,351,000)	$ (24,393,000)	$ (25,192,000)	$ (71,364,000)	$ (72,811,000)	$ (73,319,000)
Accumulated deficit	(648,131,000)				(576,767,000)				(648,131,000)	(576,767,000)		(648,131,000)
Product Revenue												0
Cash and cash equivalents	$ 142,261,000				$ 194,960,000				$ 142,261,000	$ 194,960,000	$ 160,938,000	$ 142,261,000	$ 191,206,000