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Cash and Cash Equivalents (Tables) | 6 Months Ended
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Jun. 30, 2021
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) | June 30, 2021 |  | December 31, 2020
North America | $ | 6,473 |  |  | $ | 9,812 |
People's Republic of China ("PRC") | 18,614 |  | 14,244
Asia (excluding the PRC) | 10,382 |  | 13,518
Europe | 22,021 |  | 10,926
South America | 10,200 |  | 8,653
Total cash and cash equivalents | $ | 67,690 |  |  | $ | 57,153 |

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