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Debt Long term debt (Tables) | 9 Months Ended
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Sep. 30, 2015
Long-term Debt, Unclassified [Abstract] |
Schedule of Maturities of Long-term Debt [Table Text Block] | Estimated future principal payments, interest, and fees due under the Loan and Security Agreement are as follows:
Years Ending December 31, | (in millions)
2015 | $ | 0.3 |
2016 | 5.3 |
2017 | 6.7 |
2018 | 6.2 |
Total | $ | 18.5 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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