SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 16,215	$ 13,992
Long-lived assets, net of accumulated depreciation and amortization (b)	7	289
Net assets	43,978	8,014	$ 43,152
United Kingdom
Segment Reporting Information [Line Items]
Revenue	3,533	2,653
Long-lived assets, net of accumulated depreciation and amortization (b)	7	0
Net assets	2,802	1,803
Australia
Segment Reporting Information [Line Items]
Revenue	7,639	5,336
Long-lived assets, net of accumulated depreciation and amortization (b)	0	0
Net assets	2,909	1,146
United States
Segment Reporting Information [Line Items]
Revenue	3,535	4,104
Long-lived assets, net of accumulated depreciation and amortization (b)	0	288
Net assets	35,365	3,691
Europe
Segment Reporting Information [Line Items]
Revenue	1,508	1,899
Long-lived assets, net of accumulated depreciation and amortization (b)	0	1
Net assets	$ 2,902	$ 1,374