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Balance Sheet Components (Narrative) (Detail) (USD $)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 846,000 $ 598,000 $ 631,000
Disposals of fixed assets 254,000 75,000 192,000
Fully depreciated equipment $ 19,300,000 $ 19,400,000