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Income Taxes - Reconciliation of Federal Statutory Tax Rate to Effective Tax Rate (Detail)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Income Tax Rate Reconciliation [Line Items]      
Federal statutory income tax rate 34.00% 34.00% [1] 34.00% [1]
Current state taxes 56.90% 3.40% [1] 2.70% [1]
Foreign rate differential 24.10% (9.40%) [1] (20.40%) [1]
Permanent items 0.00% (0.50%) [1] 0.30% [1]
Expired net operating losses 313.60% (47.90%) [1] 3.90% [1]
Research and development credits (26.30%) 2.30% [1] (1.70%) [1]
Foreign withholding tax 4.50% 0.00% [1] 0.00% [1]
Nondeductible secondary offering expenditures 10.20% 0.00% [1] 0.00% [1]
Other items 7.20% (2.90%) [1] (5.00%) [1]
Net change in valuation allowance (388.50%) 9.60% [1] (11.40%) [1]
Effective tax rate 35.70% (11.40%) [1] 2.40% [1]
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