Balance Sheet Components - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income.
Balance	$ 75,780
Balance	59,660	$ 75,780
Foreign Currency Items
Accumulated Other Comprehensive Income.
Balance	1,168	2,364
Other comprehensive income (loss) before reclassifications	(47)	(1,196)
Net current period other comprehensive income (loss)	(47)	(1,196)
Balance	1,121	1,168
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income.
Balance	(77)	18
Other comprehensive income (loss) before reclassifications	63	(99)
Amounts reclassified from accumulated other comprehensive income	(1)	4
Net current period other comprehensive income (loss)	62	(95)
Balance	(15)	(77)
Change in Defined Benefit Pension Obligation
Accumulated Other Comprehensive Income.
Balance	(1,517)	(567)
Other comprehensive income (loss) before reclassifications	(549)	(950)
Net current period other comprehensive income (loss)	(549)	(950)
Balance	(2,066)	(1,517)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income.
Balance	(426)	1,815
Other comprehensive income (loss) before reclassifications	(533)	(2,245)
Amounts reclassified from accumulated other comprehensive income	(1)	4
Net current period other comprehensive income (loss)	(534)	(2,241)
Balance	$ (960)	$ (426)