Balance Sheet Components - Accrued liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014
Balance Sheet Related Disclosures [Abstract]
Accrued compensation and benefit	$ 6,584	$ 5,600
Accrued vacation	2,091	1,830
Accrued bonuses	1,445	1,152
Warranty accrual	1,596	1,957	$ 1,117	$ 1,346
Stock rotation accrual	2,056	1,894	$ 1,774	$ 1,645
Accrued professional fees	1,548	1,402
ESPP payable	878	343
Customer deposits	580	149
Accrued inventory	1,187	697
Accrued facilities related expenses	1,325	1,367
Other accrued expenses	2,721	2,834
Accrued liabilities	$ 22,011	$ 19,225