Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Components of Deferred Tax Assets and Liabilities [Abstract]
Warranty accrual	$ 2,213	$ 2,493
Marketing fund accrual	1,792	1,163
Inventory valuation	12,214	10,158
Stock-based compensation	5,186	4,800
Accrued vacation and bonus	2,544	1,230
Payable to foreign subsidiaries	1,824	1,716
Deferred revenue	3,221	425
Other	2,514	1,003
Total deferred income tax assets	31,508	22,988
Deferred tax liabilities-depreciation and other	(3,048)	(628)
Deferred income taxes assets-net	$ 28,460	$ 22,360