Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Detail)

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Fair Value Measurements (Detail) (USD $)
Mar. 31, 2013
Jun. 30, 2012
Fair Value Measurements [Line Items]    
Derivative Liabilities $ 2,048,000 $ 4,943,000
Fair Value, Inputs, Level 1
   
Fair Value Measurements [Line Items]    
Derivative Liabilities 0 0
Fair Value, Inputs, Level 2
   
Fair Value Measurements [Line Items]    
Derivative Liabilities 0 0
Fair Value, Inputs, Level 3
   
Fair Value Measurements [Line Items]    
Derivative Liabilities $ 2,048,000 $ 4,943,000