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Fair Value of Financial Instruments - Schedule of Fair Value Inputs Liabilities Quantitative Information (Detail) (Derivative liability [Member], Lattice Model [Member])
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12 Months Ended |
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Dec. 31, 2013
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| Fair Value Inputs, Liabilities, Quantitative Information [Line Items] | |
| Probability of exit | 90.00% |
| Credit Spread | 8.90% |
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Minimum [Member]
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| Fair Value Inputs, Liabilities, Quantitative Information [Line Items] | |
| Remaining term | 9 months 18 days |
| Yield Volatility | 21.40% |
| Risk-free rate | 0.13% |
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Maximum [Member]
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| Fair Value Inputs, Liabilities, Quantitative Information [Line Items] | |
| Remaining term | 8 years 3 months 18 days |
| Yield Volatility | 31.10% |
| Risk-free rate | 2.45% |