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WARRANT LIABILITY AND FAIR VALUE MEASUREMENTS - Conversion Option - Valuation Methodology (Detail) - Share Purchase Warrants [Member] - $ / shares
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Stock price $ 3.88 $ 6.12
Exercise price $ 1.20  
Contractual term (years) 1 year 11 days  
Volatility (annual) 78.00%  
Risk-free rate 1.00% 1.00%
Dividend yield (per share) 0.00% 0.00%
Maximum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Exercise price   $ 300.00
Contractual term (years)   4 years 2 months 12 days
Volatility (annual)   151.00%
Minimum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Exercise price   $ 1.20
Contractual term (years)   3 months 11 days
Volatility (annual)   68.00%