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Cash and Cash Equivalents and Restricted Cash (Tables) | 3 Months Ended
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Mar. 31, 2018
Cash and Cash Equivalents [Abstract] |
Cash and Cash Equivalents by Geographic Region | Cash and cash equivalents were held in the following geographic regions:
(In thousands) | March 31, 2018 |  | December 31, 2017
United States | $ | 2,455 |  |  | $ | 10,489 |
People's Republic of China ("PRC") | 17,120 |  |  | 23,283 |
Asia (excluding the PRC) | 1,386 |  |  | 1,405 |
Europe | 11,861 |  |  | 18,071 |
South America | 7,407 |  |  | 9,190 |
Total cash and cash equivalents | $ | 40,229 |  |  | $ | 62,438 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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