SEGMENT AND GEOGRAPHIC DATA - Geographic Data Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 39,674	$ 24,573	$ 74,135	$ 48,704
Long-lived assets, net of accumulated depreciation and amortization	3,502	146	3,502	146
Net assets	34,803	32,392	34,803	32,392
Australia
Segment Reporting Information [Line Items]
Revenue	26,543	16,966	50,017	31,997
Long-lived assets, net of accumulated depreciation and amortization	34	30	34	30
Net assets	6,843	4,354	6,843	4,354
United States
Segment Reporting Information [Line Items]
Revenue	5,067	1,900	9,315	4,773
Long-lived assets, net of accumulated depreciation and amortization	3,392	33	3,392	33
Net assets	18,608	19,580	18,608	19,580
United Kingdon
Segment Reporting Information [Line Items]
Revenue	5,005	3,027	8,876	6,478
Long-lived assets, net of accumulated depreciation and amortization	35	29	35	29
Net assets	2,537	1,927	2,537	1,927
Other
Segment Reporting Information [Line Items]
Revenue	3,059	2,680	5,927	5,456
Long-lived assets, net of accumulated depreciation and amortization	41	54	41	54
Net assets	$ 6,815	$ 6,531	$ 6,815	$ 6,531