Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Derivative Liabilities Recorded (Detail)

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Fair Value of Derivative Liabilities Recorded (Detail) (USD $)
Mar. 31, 2013
Jun. 30, 2012
Derivative Liabilities $ 2,048,000 $ 4,943,000
Estimated Fair Value Of New Derivative Liabilities [Member]
   
Derivative Liabilities 931,000  
Change In Estimated Fair Value Recognized In Results Of Operations [Member]
   
Derivative Liabilities $ (3,826,000)