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Derivative Financial Instruments - Significant Assumptions Utilized in Valuation Technique (Detail) - $ / shares
1 Months Ended 12 Months Ended
Mar. 08, 2016
Dec. 01, 2014
Oct. 01, 2014
Aug. 14, 2014
Dec. 31, 2015
Dec. 31, 2015
Mar. 31, 2016
Dec. 31, 2013
Derivative [Line Items]                
Underlying price on valuation date   $ 2.50 $ 2.50 $ 2.50 $ 2.50 $ 2.50 $ 1.25 $ 2.50
Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]                
Derivative [Line Items]                
Underlying price on valuation date $ 1.25     2.50 2.50 2.50    
Contractual conversion rate $ 3.15     $ 3.15 $ 3.15 $ 3.15    
Contractual term to maturity 1 year 9 months 26 days     2 years   2 years    
Implied expected term to maturity 1 year 2 months 27 days     1 year 10 months 6 days   1 year 9 months 26 days    
Market volatility:                
Range of equivalent volatilities 120.10%     51.20%   98.10%    
Contractual interest rate 11.00%       11.00% 11.00%    
Range of equivalent market risk adjusted interest rates 11.60%     9.50% 11.00% 11.00%    
Range of equivalent credit risk adjusted yields 4.13%     4.15% 3.76% 3.76%    
Range of equivalent credit risk adjusted yields 4.13%     4.15% 3.76% 3.76%    
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]                
Derivative [Line Items]                
Underlying price on valuation date $ 1.25   2.50   $ 2.50 $ 2.50    
Contractual conversion rate $ 3.15   $ 3.15   $ 3.15 $ 3.15    
Contractual term to maturity 1 year 9 months 26 days   2 years     2 years    
Implied expected term to maturity 1 year 2 months 27 days   1 year 9 months 15 days     1 year 9 months 26 days    
Market volatility:                
Range of equivalent volatilities 120.10%   68.00%     98.10%    
Contractual interest rate 11.00%       11.00% 11.00%    
Range of equivalent market risk adjusted interest rates 11.60%   9.25%   11.00% 11.00%    
Range of equivalent credit risk adjusted yields 4.13%   4.24%   3.76% 3.76%    
Range of equivalent credit risk adjusted yields 4.13%   4.24%   3.76% 3.76%    
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]                
Derivative [Line Items]                
Underlying price on valuation date $ 1.25 2.50     $ 2.50 $ 2.50    
Contractual conversion rate $ 3.15 $ 3.15     $ 3.15 $ 3.15    
Contractual term to maturity 1 year 9 months 26 days 2 years     2 years      
Implied expected term to maturity 1 year 2 months 27 days 1 year 9 months 4 days     1 year 9 months 26 days      
Market volatility:                
Range of equivalent volatilities 120.10% 72.20%     98.10%      
Contractual interest rate 11.00%       11.00% 11.00%    
Range of equivalent market risk adjusted interest rates 11.60% 9.25%     11.00% 11.00%    
Range of equivalent credit risk adjusted yields 4.13% 4.52%     3.76% 3.76%    
Range of equivalent credit risk adjusted yields 4.13% 4.52%     3.76% 3.76%    
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]                
Market volatility:                
Range of volatilities 96.00%     37.00%   85.20%    
Contractual interest rate       8.00%        
Range of equivalent credit risk adjusted yields 3.49%     3.94% 3.29% 3.29%    
Range of equivalent credit risk adjusted yields 3.49%     3.94% 3.29% 3.29%    
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]                
Market volatility:                
Range of volatilities 96.00%   58.60%     85.20%    
Contractual interest rate     8.00%          
Range of equivalent credit risk adjusted yields 3.49%   3.97%   3.29% 3.29%    
Range of equivalent credit risk adjusted yields 3.49%   3.97%   3.29% 3.29%    
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]                
Market volatility:                
Range of volatilities 96.00% 61.80%     85.20%      
Contractual interest rate   8.00%            
Range of equivalent credit risk adjusted yields 3.49% 4.29%     3.29% 3.29%    
Range of equivalent credit risk adjusted yields 3.49% 4.29%     3.29% 3.29%    
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]                
Market volatility:                
Range of volatilities 154.00%     62.20%   109.80%    
Contractual interest rate       11.00%        
Range of equivalent credit risk adjusted yields 5.02%     4.45% 4.22% 4.22%    
Range of equivalent credit risk adjusted yields 5.02%     4.45% 4.22% 4.22%    
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]                
Market volatility:                
Range of volatilities 154.00%   75.30%     109.80%    
Contractual interest rate     11.00%          
Range of equivalent credit risk adjusted yields 5.02%   4.61%   4.22% 4.22%    
Range of equivalent credit risk adjusted yields 5.02%   4.61%   4.22% 4.22%    
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]                
Market volatility:                
Range of volatilities 154.00% 79.80%     109.80%      
Contractual interest rate   11.00%            
Range of equivalent credit risk adjusted yields 5.02% 4.84%     4.22% 4.22%    
Range of equivalent credit risk adjusted yields 5.02% 4.84%     4.22% 4.22%