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Income Taxes - Net Deferred Tax Assets (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Jun. 30, 2013
Components of Deferred Tax Assets and Liabilities [Abstract]    
Warranty accrual $ 2,459 $ 2,204
Marketing fund accrual 938 795
Inventory valuation 9,472 10,313
Stock-based compensation 4,114 3,889
Research and development credit 1,938 1,906
Other 4,719 4,216
Total deferred income tax assets 23,640 23,323
Deferred tax liabilities-depreciation and other (644) (262)
Deferred income taxes assets-net $ 22,996 $ 23,061