License Agreements (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2017 |
Mar. 31, 2016 |
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| Research and Development in Process | $ 575 | $ 0 |
| AR IL-13 License [Member] | ||
| Research and Development in Process | 250 | 0 |
| IVICV License [Member] | ||
| Research and Development in Process | 125 | 0 |
| UCLA License [Member] | ||
| Research and Development in Process | $ 200 | $ 0 |
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- Definition The amount of purchased research and development assets that are acquired in a business combination have no alternative future use and are therefore written off in the period of acquisition. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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