Geographic information - Operations by Geographic Area - Long-lived Assets (Details) - USD ($) |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Operations by Geographic Area | ||
| Long-lived assets | $ 36,118,000 | $ 40,679,000 |
| Clinical materials | 3,953,000 | 4,695,000 |
| U.K. | ||
| Operations by Geographic Area | ||
| Long-lived assets | 18,828,000 | 22,786,000 |
| U.S. | ||
| Operations by Geographic Area | ||
| Long-lived assets | $ 17,290,000 | $ 17,893,000 |
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- Definition Clinical materials for use in research and development with alternative future use not expected to be consumed within the normal operating cycle. No definition available.
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- References No definition available.
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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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