Nature of Business and Plan of Operations (Details) - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Nature of Business and Plan of Operations
Net loss	$ (44,731,000)	$ (33,740,000)
Accumulated deficit	(898,418,000)		$ (853,687,000)
Product Revenue	0
Cash and cash equivalents	$ 196,000,000	$ 247,843,000	$ 245,026,000	$ 278,109,000