Income Taxes (Tables)

12 Months Ended

Jun. 30, 2014

Income Taxes

Reconciliation of the Company's expected tax benefit, as computed by applying the U.S. federal corporate tax rate to loss before the benefit for income taxes, and actual tax

The difference between the Company's expected tax benefit, as computed by applying the U.S. federal corporate tax rate of 34% to loss before the benefit for income taxes, and actual tax is reconciled in the following chart (in thousands):

	Year Ended June 30,
	2014			2013			2012
Loss before income tax expense	$	(71,364	)	$	(72,811	)	$	(73,319	)
Expected tax benefit at 34%	$	(24,264	)	$	(24,756	)	$	(24,928	)
Permanent differences		1,953			1,540			1,470
State tax benefit net of federal benefit		(4,062	)		(3,921	)		(4,204	)
Increase in valuation allowance, net		26,011			25,624			25,274
Federal research credit		(1,002	)		(2,260	)		(603	)
Expired loss and credit carryforwards		1,364			3,773			2,991
Benefit for income taxes	$	—		$	—		$	—

Schedule of significant components of deferred tax assets

Significant components of the Company's deferred tax assets as of June 30, 2014 and 2013 are as follows (in thousands):

	June 30,
	2014			2013
Net operating loss carryforwards	$	144,230		$	121,937
Research and development tax credit carryforwards		14,453			12,806
Property and other intangible assets		2,386			2,077
Deferred revenue		24,095			25,484
Stock-based compensation		9,047			6,534
Deferred lease incentive		3,908			3,996
Other liabilities		1,234			508
Total deferred tax assets	$	199,353		$	173,342
Valuation allowance		(199,353	)		(173,342	)
Net deferred tax assets	$	—		$	—