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Derivative Financial Instruments - Significant Assumptions Utilized in Valuation Technique (Detail) - $ / shares
9 Months Ended
Dec. 01, 2014
Oct. 01, 2014
Aug. 14, 2014
Sep. 30, 2015
Sep. 30, 2014
Derivative [Line Items]          
Quoted market price/ underlying price on valuation date       $ 2.5  
Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]          
Derivative [Line Items]          
Quoted market price/ underlying price on valuation date     $ 2.50 2.50 $ 2.50
Contractual conversion rate     $ 3.15 $ 3.15 $ 3.15
Contractual term to maturity     2 years 10 months 13 days 1 year 10 months 13 days
Implied expected term to maturity     1 year 10 months 6 days 9 months 29 days 1 year 8 months 5 days
Market volatility:          
Range of equivalent volatilities     51.20% 103.21% 62.30%
Contractual interest rate       11.00%  
Range of equivalent market risk adjusted interest rates     9.50% 11.00% 9.50%
Range of equivalent credit risk adjusted yields     4.15% 3.31% 4.24%
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]          
Derivative [Line Items]          
Quoted market price/ underlying price on valuation date   $ 2.50   $ 2.50  
Contractual conversion rate   $ 3.15   $ 3.15  
Contractual term to maturity   2 years   1 year 4 days  
Implied expected term to maturity   1 year 9 months 15 days   11 months 16 days  
Market volatility:          
Range of equivalent volatilities   68.00%   99.87%  
Contractual interest rate       11.00%  
Range of equivalent market risk adjusted interest rates   9.25%   11.00%  
Range of equivalent credit risk adjusted yields   4.24%   3.31%  
Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]          
Derivative [Line Items]          
Quoted market price/ underlying price on valuation date $ 2.50     $ 2.50  
Contractual conversion rate $ 3.15     $ 3.15  
Contractual term to maturity 2 years     1 year 2 months 1 day  
Implied expected term to maturity 1 year 9 months 4 days     1 year 1 month 2 days  
Market volatility:          
Range of equivalent volatilities 72.20%     98.87%  
Range of equivalent market risk adjusted interest rates 9.25%     10.25%  
Range of equivalent credit risk adjusted yields 4.52%     3.39%  
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]          
Market volatility:          
Range of volatilities     37.00% 91.00% 55.50%
Contractual interest rate     8.00%   8.00%
Range of equivalent credit risk adjusted yields     3.94% 3.31% 3.97%
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]          
Market volatility:          
Range of volatilities   58.60%   89.50%  
Contractual interest rate   8.00%      
Range of equivalent credit risk adjusted yields   3.97%   3.31%  
Minimum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]          
Market volatility:          
Range of volatilities 61.80%     87.80%  
Contractual interest rate 8.00%     8.00%  
Range of equivalent credit risk adjusted yields 4.29%     3.31%  
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | First Tranche [Member]          
Market volatility:          
Range of volatilities     62.20% 123.90% 70.50%
Contractual interest rate     11.00%   11.00%
Range of equivalent credit risk adjusted yields     4.45% 4.23% 4.61%
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Second Tranche [Member]          
Market volatility:          
Range of volatilities   75.30%   114.90%  
Contractual interest rate   11.00%      
Range of equivalent credit risk adjusted yields   4.61%   4.23%  
Maximum [Member] | Monte Carlo Simulations [Member] | Monaco Notes [Member] | Third Tranche [Member]          
Market volatility:          
Range of volatilities 79.80%     110.20%  
Contractual interest rate 11.00%     11.00%  
Range of equivalent credit risk adjusted yields 4.84%     4.23%