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Warrant Activity (Detail) - 6 months ended Jun. 30, 2015 - $ / shares
Total
Number of Shares Issuable  
Granted 989,970
Weighted Average Exercise Price  
Granted $ 1.16
Warrant  
Number of Shares Issuable  
Balance, Beginning 1,166,146
Granted 0
Exercised 0
Expired (176,176)
Balance, Ending 989,970
Weighted Average Exercise Price  
Balance, Beginning $ 1.13
Granted 0
Exercised 0
Cancelled 0.94
Balance, Ending $ 1.16