Income Taxes (Details 1) (USD $) In Thousands	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Deferred tax assets:
Net operating loss carryforwards	$ 1,795	$ 3,312
Depreciation and amortization	1,160	761
Accrued expenses	1,551	1,245
Shared-based compensation	6,886	5,923
Corporate minimum tax	488	167
Deferred tax assets from research and development credit carryforwards	629	330
Subtotal	12,509	11,738
Valuation allowance	(1,646)	(944)
Total deferred tax assets	10,863	10,794
Deferred tax liabilities:
Depreciation and amortization	(6,484)	(5,401)
Other	0	(22)
Total deferred tax liabilities	(6,484)	(5,423)
Net deferred tax assets	4,379	5,371
Summary of reconciliation of the gross beginning and ending amount of unrecognized tax benefits
Beginning Balance	2,331	1,477
Additions based on tax positions related to the current tax year	410	290
Additions based on tax positions related to prior tax years	411	585
Reductions due to audit settlements	(656)	(21)
Ending Balance	$ 2,496	$ 2,331