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NET (LOSS) INCOME PER SHARE - Computation of income (loss) per share (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Numerator:        
Net (loss) income $ (1,893,377) $ 5,974,140 $ (4,313,262) $ 1,224,401
Less: non-cash income from change in fair value of common stock warrants 0 3,697,000 0 2,492,000
Net (loss) income - diluted $ (1,893,377) $ 2,277,140 $ (4,313,262) $ (1,267,599)
Denominator:        
Weighted average common shares outstanding - basic 8,576,634 5,935,000 8,503,521 5,908,917
Dilutive effect of warrants, net 0 565,417 0 743,500
Dilutive effect of stock options, net 0 24,333 0 0
Weighted average common shares outstanding - diluted 8,576,634 6,524,750 8,503,521 6,652,417
Net (loss) income per share data:        
Basic $ (0.22) $ 1.01 $ (0.51) $ 0.21
Diluted $ (0.22) $ 0.35 $ (0.51) $ (0.19)