Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Annual future minimum lease payments for non-cancelable operating lease [Abstract]
2015	$ 446
2016	459
2017	497
2018	635
2019	629
Thereafter	315
Total	2,981
Rent expense	496	431	470
License and Escrow Agreement [Abstract]
Term of the agreement	5 years
Automatic renewal period under sale and purchase agreement	2 years
Non renewal period under sale and purchase agreement	6 months
Short-term investment minimum	2,000
Loss Contingency [Abstract]
Damages sought by supplier	350
Estimate of possible loss	82
Warranty [Abstract]
Period of warranty on products, minimum	1 year
Period of warranty on products, maximum	2 years
Schedule of changes in product liability included in accrued liabilities [Roll Forward]
Beginning balance	489	547
Warranties issued during the period	172	224
Settlements made during the period	(104)	(259)
Changes in liability for pre-existing warranties during the period	(59)	(23)
Ending balance	$ 498	$ 489	$ 547
Rancho Cordova [Member]
Operating Leased Assets [Line Items]
Lease expiration date	May 31, 2019
Emeryville [Member]
Operating Leased Assets [Line Items]
Renewal period under operating lease	5 years
Lease expiration date	Apr. 30, 2020