Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Deferred tax assets:
Federal, state, and foreign net operating loss carryovers	$ 651	$ 656
Stock option compensation	1,696	1,353
Accrued vacation, allowance for returns, bonuses & other	2,965	1,395
Gross deferred tax asset	5,312	3,404
Deferred liabilities
Patents and trademarks	(417)	(468)
Change in tax accounting methods	0	(98)
Property & equipment	(722)	(1,268)
Gross deferred tax liabilities	(1,139)	(1,834)
Less: valuation allowance	(267)	(218)
Deferred tax assets, net	$ 3,906	$ 1,352