OPERATING SEGMENTS, Geographical Information of Long-Lived Assets Based on Physical Location (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 58,446	$ 55,134
Belarus
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	44,966	41,652
Ukraine
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	4,291	4,392
Hungary
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	2,367	2,773
Russia
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	2,311	2,196
United States
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	1,863	2,001
Other
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 2,648	$ 2,120