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Fair Value Measurements, On Recurring Basis (Details) - Recurring [Member] - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: [Abstract] |  |  |
Money market funds | [1] | $ 32,079 | $ 67,569
Foreign exchange options | [2] |  | 6
Total |  | 32,079 | 67,575
Liabilities: [Abstract] |  |  |
Contingent warrant liabilities |  | 28,956 | 31,828
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |  |
Assets: [Abstract] |  |  |
Money market funds | [1] | 32,079 | 67,569
Foreign exchange options | [2] |  | 0
Total |  | 32,079 | 67,569
Liabilities: [Abstract] |  |  |
Contingent warrant liabilities |  | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |  |
Assets: [Abstract] |  |  |
Money market funds | [1] | 0 | 0
Foreign exchange options | [2] |  | 6
Total |  |  | 6
Liabilities: [Abstract] |  |  |
Contingent warrant liabilities |  | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Assets: [Abstract] |  |  |
Money market funds | [1] | 0 | 0
Foreign exchange options | [2] |  | 0
Total |  |  | 0
Liabilities: [Abstract] |  |  |
Contingent warrant liabilities |  | $ 28,956 | $ 31,828
[1] | Included in cash and cash equivalents.
[2] | Included in other assets

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- References No definition available. + Details
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- Definition Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Fair value portion of other liabilities. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes money market funds included in cash and cash equivalents. + References No definition available. + Details
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