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Subsequent Events - Additional Information (Detail) (8% convertible promissory notes, USD $)
Jun. 30, 2014
Subsequent Event [Line Items]  
Debt Instrument, Face Amount $ 500,000
Class Of Warrant Or Right, Number Of Securities Called By Warrants Or Rights 1,900,000
Debt Instrument, Interest Rate, Stated Percentage 8.00%
Subsequent Event
 
Subsequent Event [Line Items]  
Debt Instrument, Interest Rate, Stated Percentage 8.00%