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WARRANT LIABILITY AND FAIR VALUE MEASUREMENTS - Conversion Option - Valuation Methodology (Detail) - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Dividend yield (per share) 0.00% 0.00%
Share Purchase Warrants [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Stock price $ 4.49 $ 8.16
Exercise price $ 1.20  
Share Purchase Warrants [Member] | Maximum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Exercise price   $ 300.00
Contractual term (years) 1 year 3 months 11 days 4 years 5 months 12 days
Volatility (annual) 79.00% 151.00%
Risk-free rate 1.03% 1.12%
Share Purchase Warrants [Member] | Minimum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Exercise price   $ 1.20
Contractual term (years) 1 month 13 days 6 months 11 days
Volatility (annual) 67.00% 85.00%
Risk-free rate 0.74% 0.65%