Quarterly report pursuant to Section 13 or 15(d)

Warrants - Summary of Warrant Activity (Detail)

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Warrants - Summary of Warrant Activity (Detail) (USD $)
 0 Months Ended 6 Months Ended 12 Months Ended
Apr. 15, 2014
Jun. 30, 2014
Dec. 31, 2013
Equity [Abstract]      
Warrants, Beginning balance   2,747,094 3,235,982
Warrants, Granted   0 0
Warrants, Exercised   (210,000) (200,000)
Warrants, Expired (5,000) (5,000) (288,888)
Warrants, Ending balance   2,532,094 2,747,094
Weighted Average Price, Beginning balance   $ 1.91 $ 3.53
Weighted Average Price, Granted   $ 0 $ 0
Weighted Average Price, Exercised   $ 1.50 $ 1.50
Weighted Average Price, Expired $ 10.00 $ 10.00 $ 19.87
Weighted Average Price, Ending balance   $ 1.93 $ 1.91