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Cash and Cash Equivalents (Tables) | 3 Months Ended
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Mar. 31, 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) | March 31, 2021 |  | December 31, 2020
North America | $ | 5,618 |  |  | $ | 9,812 |
People's Republic of China ("PRC") | 13,941 |  | 14,244
Asia (excluding the PRC) | 12,451 |  | 13,518
Europe | 15,319 |  | 10,926
South America | 8,034 |  | 8,653
Total cash and cash equivalents | $ | 55,363 |  |  | $ | 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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