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Cash and Cash Equivalents
 6 Months Ended
Jun. 30, 2020
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents Cash and Cash Equivalents
Cash and cash equivalents were held in the following geographic regions:
(In thousands)
June 30, 2020
 
December 31, 2019
United States
$
8,608

 
$
16,751

People's Republic of China ("PRC")
14,799

 
13,700

Asia (excluding the PRC)
9,808

 
21,691

Europe
15,185

 
9,081

South America
10,432

 
13,079

Total cash and cash equivalents
$
58,832

 
$
74,302