Cash and Cash Equivalents and Restricted Cash (Tables)

3 Months Ended

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