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Commitments and Contingencies (Narrative) (Detail) (USD $)
 12 Months Ended
Jun. 30, 2012
Month
Jun. 30, 2011
Jun. 30, 2010
Operating Leases [Line Items]      
Leases expiration date Apr. 06, 2014    
Leases expiration period August 2016    
Advance notice period of cancellation of lease 6    
Optional lease termination date September 2014    
Operating lease agreements, expiration year 2016    
Rent expense related to operating leases charged to operations $ 466,000 $ 449,000 $ 449,000