Income Taxes (Tables)

12 Months Ended

Jun. 30, 2012

Income Taxes [Abstract]

Deferred tax assets and liabilities

	June 30,
	2012			2011
Deferred tax assets
Stock-based compensation	$	5,415		$	6,420
Accrued expenses		1,065			933
Inventories		1,049			448
Depreciation and amortization		175			109
Other		354			2,073
Research and development credit carryforwards		3,204			3,446
Net operating loss carryforwards		45,203			38,944
Total deferred tax assets		56,465			52,373
Valuation allowance		(56,465	)		(52,373	)
Net deferred tax assets	$	—		$	—

Summary of valuation allowances

	Amount
Balance at June 30, 2010	$	49,180
Additions		3,193
Balance at June 30, 2011		52,373
Additions		4,092
Balance at June 30, 2012	$	56,465

Reconciliation of beginning and ending amount of unrecognized tax benefits

Balance at July 1, 2010	$	347
Increases related to prior year tax positions		22
Increases related to current year tax positions		14
Balance at June 30, 2011	$	383
Increases related to prior year tax positions		(6	)
Increases related to current year tax positions		4
Balance at June 30, 2012	$	381