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Cash and Cash Equivalents
3 Months Ended
Mar. 31, 2019
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents
Cash and Cash Equivalents
Cash and Cash Equivalents
Cash and cash equivalents were held in the following geographic regions:
(In thousands)
March 31, 2019
 
December 31, 2018
United States
$
6,113

 
$
1,156

People's Republic of China ("PRC")
12,981

 
20,885

Asia (excluding the PRC)
7,889

 
2,398

Europe
8,694

 
19,907

South America
9,218

 
8,861

Total cash and cash equivalents
$
44,895

 
$
53,207