BUSINESS SEGMENTS AND MAJOR CUSTOMERS - Revenues generated from geographic regions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
BUSINESS SEGMENTS AND MAJOR CUSTOMERS
Total revenue	$ 12,204	$ 16,131
Operating Segments | United States
BUSINESS SEGMENTS AND MAJOR CUSTOMERS
Total revenue	6,091	7,439
Operating Segments | United Kingdom
BUSINESS SEGMENTS AND MAJOR CUSTOMERS
Total revenue	2,334	4,004
Operating Segments | Brazil
BUSINESS SEGMENTS AND MAJOR CUSTOMERS
Total revenue	876	2,473
Operating Segments | Rest of World
BUSINESS SEGMENTS AND MAJOR CUSTOMERS
Total revenue	$ 2,903	$ 2,215