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Shareholders' Equity Equity Issuances (Details) (USD $) | 9 Months Ended |  |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | May 08, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Aspire Capital Purchase Agreement [Member] | Sep. 30, 2014 Aspire Capital Purchase Agreement [Member] | Sep. 28, 2011 Aspire Capital Purchase Agreement [Member] | Mar. 31, 2014 Aspire Capital Purchase Agreement [Member] | Sep. 30, 2014 Maximum [Member] | Sep. 30, 2014 Minimum [Member] | Oct. 06, 2014 Common Stock [Member] 2009 Equity Plan [Member] Stock Options [Member]
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Excess Stock, Shares Authorized |  |  |  |  |  |  |  |  |  |  | 3,000,000
Common Stock, Shares Authorized | 500,000,000 |  |  | 500,000,000 |  |  |  |  |  |  | 8,995,000
Committment Value Under Purchase Agreement |  |  |  |  | $ 20,000,000 |  |  |  |  |  |
Term Of Agreement In Months |  |  |  |  | 24 |  | 24 |  |  |  |
Discount Applied To Weighted Average Price |  |  |  |  | 5.00% |  |  |  |  |  |
Proceeds from Issuance of Common Stock Gross |  |  |  |  | 5,600,000 |  |  |  |  |  |
Common Stock, Shares, Issued | 35,485,523 |  | 5,329,593 | 27,196,537 |  |  |  | 150,000 |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  |  |  |  | 30,000,000 |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  | 900,000 |  | 800,000 |  |  |
Net proceeds from issuance of common stock | 11,275,109 | 21,517,422 |  |  |  | 5,600,000 |  |  |  |  |
Stock Option Exercise | 48,987 |  |  |  |  |  |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |  |  |  |  |  |  |  |  | $ 6.20 | $ 5.20 |
Proceeds from Stock Options Exercised | $ 300,000 |  |  |  |  |  |  |  |  |  |

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