v3.7.0.1
SEGMENT INFORMATION - Property, Plant, and Equipment by Geographic Region (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]    
Property and equipment, net $ 7,638 $ 9,008
United States    
Segment Reporting Information [Line Items]    
Property and equipment, net 6,446 7,685
People's Republic of China    
Segment Reporting Information [Line Items]    
Property and equipment, net 1,014 1,096
United Kingdom    
Segment Reporting Information [Line Items]    
Property and equipment, net $ 178 $ 227