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Assets/Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)
Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Cash equivalents $ 3,473
Derivative liabilities 1,106
TOTAL 4,579
Quoted Price in Active Markets for Identical Instruments Level 1
 
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Cash equivalents 0
Derivative liabilities 0
TOTAL 0
Significant Other Observable Inputs Level 2
 
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Cash equivalents 3,473
Derivative liabilities 1,106
TOTAL 4,579
Significant Unobservable Inputs Level 3
 
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Cash equivalents 0
Derivative liabilities 0
TOTAL $ 0