Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Assets And Liabilities Measured At Fair Value On Recurring Basis (Detail)

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Fair Value Measurements - Assets And Liabilities Measured At Fair Value On Recurring Basis (Detail) (USD $)
Jun. 30, 2014
Jun. 30, 2013
Fair Value, Inputs, Level 1
   
Fair Value Measurements [Line Items]    
Warrant derivative liabilities $ 0 $ 0
Fair Value, Inputs, Level 2
   
Fair Value Measurements [Line Items]    
Warrant derivative liabilities 0 0
Fair Value, Inputs, Level 3
   
Fair Value Measurements [Line Items]    
Warrant derivative liabilities $ 571,000 $ 143,000