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Intangible Assets (Narrative) (Detail) (USD $)
 12 Months Ended
Jun. 30, 2012
Year
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2011
Intangible Assets [Line Items]        
Milestone payment from Alimera $ 25,000,000      
Intangible assets, before impairment       19,426,000
Enterprise value       4,400,000
Fair value of intangible assets       4,600,000
Amortization expense 2,037,000 3,302,000 3,289,000  
Intangible assets, net 4,226,000 21,564,000   4,596,000
Amortization expense per year 770,000      
Estimated remaining useful life 5.5      
Maximum
        
Intangible Assets [Line Items]        
Market capitalization       82,000,000
Minimum
        
Intangible Assets [Line Items]        
Market capitalization       23,100,000
Durasert
        
Intangible Assets [Line Items]        
Intangible assets, before impairment       6,318,000
Intangible assets, net       3,177,000
BioSilicon
        
Intangible Assets [Line Items]        
Intangible assets, before impairment       13,108,000
Intangible assets, net       $ 1,419,000