XML 55 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Cash and Cash Equivalents and Restricted Cash - Cash and Cash Equivalents by Geographic Region (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents $ 41,995 $ 62,438
United States    
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents 3,694 10,489
People's Republic of China (PRC)    
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents 20,024 23,283
Asia (excluding the PRC)    
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents 1,350 1,405
Europe    
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents 7,976 18,071
South America    
Cash and Cash Equivalents [Line Items]    
Cash and cash equivalents $ 8,951 $ 9,190