| Common Stock, Stock Options and Warrants - Warrants by Exercise Price (Details) (Row 44 Warrants, USD $) | 9 Months Ended | 
|---|---|
| Sep. 30, 2014 | |
| Common stock warrants | |
| Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range [Line Items] | |
| Weighted Average Exercise Price per Warrant (usd per share) | $ 9.45 | 
| Number of Warrants (as converted) | 721,600 | 
| Weighted Average Remaining Life (in years) | 2 years 4 months 13 days | 
| Series C-2 Warrants | |
| Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range [Line Items] | |
| Weighted Average Exercise Price per Warrant (usd per share) | $ 8.74 | 
| Number of Warrants (as converted) | 734,451 | 
| Weighted Average Remaining Life (in years) | 2 years 8 months 5 days | 
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- Definition Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Per Warrant as Converted No definition available. 
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- Details 
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- Definition Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range, Number Outstanding as Converted No definition available. 
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- Definition Share-based Compensation, Shares Authorized under Equity Instruments Other Than Options, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual No definition available. 
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