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Summary of Net Operating Loss and Research Credit Carryforwards (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jun. 30, 2014
Domestic Country | Federal
  
Operating Loss Carryforwards [Line Items]  
Net operating losses $ 164,504
Net operating losses subject to sections 382,383 Yes
Domestic Country | Federal | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit 3,250
Research credit subject to sections 382,383 Yes
State and Local Jurisdiction | UTAH
  
Operating Loss Carryforwards [Line Items]  
Net operating losses 229,900
Net operating losses subject to sections 382,383 No
State and Local Jurisdiction | UTAH | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit 8,296
Research credit subject to sections 382,383 No
State and Local Jurisdiction | South San Francisco, California
  
Operating Loss Carryforwards [Line Items]  
Net operating losses 155,834
Net operating losses subject to sections 382,383 Yes
State and Local Jurisdiction | South San Francisco, California | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit 2,565
Research credit subject to sections 382,383 Yes
State and Local Jurisdiction | OKLAHOMA
  
Operating Loss Carryforwards [Line Items]  
Net operating losses 14,142
Net operating losses subject to sections 382,383 Yes
Foreign (various jurisdictions)
  
Operating Loss Carryforwards [Line Items]  
Net operating losses $ 27,183
Net operating losses subject to sections 382,383 No
Minimum | Domestic Country | Federal
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2027
Minimum | Domestic Country | Federal | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit, expiration in year 2025
Minimum | State and Local Jurisdiction | UTAH
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2015
Minimum | State and Local Jurisdiction | UTAH | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit, expiration in year 2021
Minimum | State and Local Jurisdiction | South San Francisco, California
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2016
Minimum | State and Local Jurisdiction | OKLAHOMA
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2023
Minimum | Foreign (various jurisdictions)
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration date ranges Various
Maximum | Domestic Country | Federal
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2033
Maximum | Domestic Country | Federal | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit, expiration in year 2032
Maximum | State and Local Jurisdiction | UTAH
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2024
Maximum | State and Local Jurisdiction | UTAH | Research
  
Operating Loss Carryforwards [Line Items]  
Research credit, expiration in year 2028
Maximum | State and Local Jurisdiction | South San Francisco, California
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2033
Maximum | State and Local Jurisdiction | OKLAHOMA
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration in year 2033
Maximum | Foreign (various jurisdictions)
  
Operating Loss Carryforwards [Line Items]  
Net operating losses, expiration date ranges Various