SEGMENT AND GEOGRAPHIC DATA - Geographic Data Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 24,573	$ 26,414	$ 48,704	$ 42,601
Net assets	32,392	34,024	32,392	34,024
United Kingdon
Segment Reporting Information [Line Items]
Revenue	3,027	4,488	6,478	8,499
Net assets	1,927	2,447	1,927	2,447
Australia
Segment Reporting Information [Line Items]
Revenue	16,966	15,289	31,997	22,057
Net assets	4,354	3,745	4,354	3,745
United States
Segment Reporting Information [Line Items]
Revenue	1,900	3,689	4,773	6,540
Net assets	19,580	22,862	19,580	22,862
Other
Segment Reporting Information [Line Items]
Revenue	2,680	2,948	5,456	5,505
Net assets	$ 6,531	$ 4,970	$ 6,531	$ 4,970