CONCENTRATION OF RISK - Long-Lived Assets (Net) by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total long-lived assets	$ 25,768	$ 22,407
UNITED STATES
Segment Reporting Information [Line Items]
Total long-lived assets	25,621	22,187
Other [Member]
Segment Reporting Information [Line Items]
Total long-lived assets	$ 147	$ 220