SEGMENT AND GEOGRAPHIC INFORMATION - Long-Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	$ 21,000	$ 18,087
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	17,443	14,023
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	2,476	2,549
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	890	1,265
Other countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	$ 191	$ 250