Income Taxes (Details 3) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Components of deferred tax assets
Net operating loss carryforwards	$ 144,230,000	$ 121,937,000
Research and development tax credit carryforwards	14,453,000	12,806,000
Property and other intangible assets	2,386,000	2,077,000
Deferred revenue	24,095,000	25,484,000
Stock-based compensation	9,047,000	6,534,000
Deferred lease incentive	3,908,000	3,996,000
Other liabilities	1,234,000	508,000
Total deferred tax assets	199,353,000	173,342,000
Valuation allowance	(199,353,000)	(173,342,000)
Income taxes, additional disclosures
Increase in valuation allowance	$ 26,000,000
Minimum increase in the ownership of certain shareholders or public groups in the stock of a corporation for an ownership change as defined by Section 382 (as a percent)	50.00%
Period over which increase in ownership of certain shareholders or public groups in the stock of a corporation for an ownership change as defined by Section 382	3 years