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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2012
Fair Value Measurements [Abstract] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Table Text Block] | The following table sets forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2012, and December 31, 2011 (in thousands):
| December 31, 2012
| Fair Value Measurements Using Fair Value Hierarchy
| Level 1 |  | Level 2 |  | Level 3
Warrant derivative liabilities | $ | — |  |  | $ | — |  |  | $ | 101.2 |
Contingent consideration | — |  |  | — |  |  | 7,550.0 |
| December 31, 2011
| Fair Value Measurements Using Fair Value Hierarchy
| Level 1 |  | Level 2 |  | Level 3
Money market investments | $ | 2,497.4 |  |  | $ | — |  |  | $ | — |
Embedded derivative liabilities | — |  |  | — |  |  | 391.7 |
Warrant derivative liabilities | — |  |  | — |  |  | 82.7 |
Contingent consideration | — |  |  | — |  |  | 3,130.0 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | For those financial instruments with significant Level 3 inputs, the following table summarizes the activity for the year ended December 31, 2012 by type of instrument (in thousands):
| Year Ended
| December 31, 2012
| Embedded Derivatives |  | Warrants |  | Contingent Consideration
Beginning liability balance | $ | 391.7 |  |  | $ | 82.7 |  |  | $ | 3,130.0 |
Change in fair value recorded in earnings | (391.7 | ) |  | 18.5 |  |  | 4,420.0 |
Ending liability balance | $ | — |  |  | $ | 101.2 |  |  | $ | 7,550.0 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets and liabilities that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 820 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -SubTopic 10 -Topic 820 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258 + Details
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