SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 103,405	$ 101,227
Long-lived assets, net of accumulated depreciation and amortization	8,941	9,949
Net assets	41,835	56,037	$ 41,885
United Kingdon
Segment Reporting Information [Line Items]
Revenue	25,169	34,196
Long-lived assets, net of accumulated depreciation and amortization	1,228	1,684
Net assets	8,297	15,771
Australia
Segment Reporting Information [Line Items]
Revenue	46,555	39,132
Long-lived assets, net of accumulated depreciation and amortization	4,185	4,191
Net assets	10,711	10,046
CHINA
Segment Reporting Information [Line Items]
Revenue	3,632	3,983
Long-lived assets, net of accumulated depreciation and amortization	2,356	2,736
Net assets	6,516	9,683
United States
Segment Reporting Information [Line Items]
Revenue	4,104	3,634
Long-lived assets, net of accumulated depreciation and amortization	288	623
Net assets	3,583	8,632
Europe
Segment Reporting Information [Line Items]
Revenue	14,211	12,123
Long-lived assets, net of accumulated depreciation and amortization	244	167
Net assets	8,766	8,211
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	9,523	7,956
Long-lived assets, net of accumulated depreciation and amortization	640	548
Net assets	4,114	3,752
Other Americas
Segment Reporting Information [Line Items]
Revenue	211	203
Long-lived assets, net of accumulated depreciation and amortization	0	0
Net assets	$ (152)	$ (58)