Quarterly report pursuant to Section 13 or 15(d)

Warrants - Summary of Warrant Activity (Detail)

v3.5.0.2
Warrants - Summary of Warrant Activity (Detail) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Equity [Abstract]    
Warrants, Beginning balance 175,584 2,532,094
Warrants, Granted 0 0
Warrants, Exercised   (185,585)
Warrants, Expired   (2,170,925)
Warrants, Ending balance 175,584 175,584
Weighted Average Price, Beginning balance $ 1.50 $ 1.93
Weighted Average Price, Granted 0 0
Weighted Average Price, Exercised   1.50
Weighted Average Price, Expired   2.00
Weighted Average Price, Ending balance $ 1.50 $ 1.50