SEGMENT AND GEOGRAPHICAL INFORMATION (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)
SEGMENT AND GEOGRAPHICAL INFORMATION
Number of segments | segment			1
Segment and geographical information
Revenues	$ 51,404	$ 53,258	$ 155,354	$ 156,387
Americas
Segment and geographical information
Revenues	27,834	28,407	84,078	80,505
Europe
Segment and geographical information
Revenues	18,066	19,731	54,795	60,935
Asia Pacific
Segment and geographical information
Revenues	$ 5,504	$ 5,120	$ 16,481	$ 14,947