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Derivative Financial Instruments - Significant Assumptions Utilized in Valuation Technique (Detail) - $ / shares
Mar. 08, 2016
Mar. 31, 2016
Dec. 31, 2015
Dec. 01, 2014
Oct. 01, 2014
Aug. 14, 2014
Dec. 31, 2013
Derivative [Line Items]              
Underlying price on valuation date   $ 1.25 $ 2.50 $ 2.50 $ 2.50 $ 2.50 $ 2.50
Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]              
Derivative [Line Items]              
Underlying price on valuation date $ 1.25            
Contractual conversion rate $ 3.15            
Contractual term to maturity 1 year 9 months 26 days            
Implied expected term to maturity 1 year 2 months 27 days            
Market volatility:              
Range of equivalent volatilities 120.10%            
Contractual interest rate 11.00%            
Range of equivalent market risk adjusted interest rates 11.60%            
Range of equivalent credit risk adjusted yields 4.13%            
Range of equivalent credit risk adjusted yields 4.13%            
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]              
Derivative [Line Items]              
Underlying price on valuation date $ 1.25            
Contractual conversion rate $ 3.15            
Contractual term to maturity 1 year 9 months 26 days            
Implied expected term to maturity 1 year 2 months 27 days            
Market volatility:              
Range of equivalent volatilities 120.10%            
Contractual interest rate 11.00%            
Range of equivalent market risk adjusted interest rates 11.60%            
Range of equivalent credit risk adjusted yields 4.13%            
Range of equivalent credit risk adjusted yields 4.13%            
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]              
Derivative [Line Items]              
Underlying price on valuation date $ 1.25            
Contractual conversion rate $ 3.15            
Contractual term to maturity 1 year 9 months 26 days            
Implied expected term to maturity 1 year 2 months 27 days            
Market volatility:              
Range of equivalent volatilities 120.10%            
Contractual interest rate 11.00%            
Range of equivalent market risk adjusted interest rates 11.60%            
Range of equivalent credit risk adjusted yields 4.13%            
Range of equivalent credit risk adjusted yields 4.13%            
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]              
Market volatility:              
Range of volatilities 96.00%            
Range of equivalent credit risk adjusted yields 3.49%            
Range of equivalent credit risk adjusted yields 3.49%            
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]              
Market volatility:              
Range of volatilities 96.00%            
Range of equivalent credit risk adjusted yields 3.49%            
Range of equivalent credit risk adjusted yields 3.49%            
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]              
Market volatility:              
Range of volatilities 96.00%            
Range of equivalent credit risk adjusted yields 3.49%            
Range of equivalent credit risk adjusted yields 3.49%            
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]              
Market volatility:              
Range of volatilities 154.00%            
Range of equivalent credit risk adjusted yields 5.02%            
Range of equivalent credit risk adjusted yields 5.02%            
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]              
Market volatility:              
Range of volatilities 154.00%            
Range of equivalent credit risk adjusted yields 5.02%            
Range of equivalent credit risk adjusted yields 5.02%            
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]              
Market volatility:              
Range of volatilities 154.00%            
Range of equivalent credit risk adjusted yields 5.02%            
Range of equivalent credit risk adjusted yields 5.02%