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Stock Incentive Plan Compensation (Stock Option Valuation Assumptions) (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Series B redeemable convertible preferred stock [Member] |  |
Risk-free interest rate |  | 0.36%
Volatility |  | 91.00%
Fair Value Assumptions, Expected Term |  | 1 year 3 months
Dividend yield | 0.00% | 0.00%
Exercise price | $ 7.00 | $ 7.00
Common stock closing price | $ 3.98 | $ 10.50
Common Stock Options [Member] |  |
Risk-free interest rate |  | 1.30%
Volatility | 139.00% | 160.90%
Fair Value Assumptions, Expected Term |  | 4 years
Dividend yield | 0.00% | 0.00%
Minimum [Member] | Series B redeemable convertible preferred stock [Member] |  |
Risk-free interest rate | 0.49% |
Volatility | 108.00% |
Fair Value Assumptions, Expected Term | 6 months |
Minimum [Member] | Common Stock Options [Member] |  |
Risk-free interest rate | 1.55% |
Fair Value Assumptions, Expected Term | 6 years |
Maximum [Member] | Series B redeemable convertible preferred stock [Member] |  |
Risk-free interest rate | 1.19% |
Volatility | 117.00% |
Fair Value Assumptions, Expected Term | 2 years 6 months |
Maximum [Member] | Common Stock Options [Member] |  |
Risk-free interest rate | 1.78% |
Fair Value Assumptions, Expected Term | 10 years |

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