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Share-based Compensation Share-based Compensation Valuation Assumptions (Details) (USD $)
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3 Months Ended |
9 Months Ended |
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
$ 0.45 |
$ 0.26 |
$ 0.72 |
$ 0.55 |
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Employee Stock Option [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |
0.00% |
0.00% |
0.00% |
0.00% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate |
1.63% |
1.40% |
1.62% |
0.97% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |
5 years 1 month 6 days |
5 years 1 month 6 days |
5 years 1 month 6 days |
5 years 1 month 6 days |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate |
101.70% |
99.80% |
104.60% |
99.80% |