| 
           Income Taxes (Detail) (USD $) 
         | 
        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Mar. 31, 2013 
         | 
        
           Mar. 31, 2012 
         | 
        
           Mar. 31, 2013 
         | 
        
           Mar. 31, 2012 
         | 
      |
| Income Tax Expense (Benefit) | $ 0 | $ 0 | $ 0 | $ 0 | 
| Effective Income Tax Rate, Continuing Operations | 0.00% | 0.00% | ||
| X | ||||||||||
| 
             
- Definition 
          A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |