SEGMENT AND GEOGRAPHIC INFORMATION - Long-Lived Assets by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	$ 18,087	$ 18,671
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	14,023	13,829
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	2,549	3,218
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	1,265	1,319
Other countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net property and equipment	$ 250	$ 305