REVENUE - Disaggregated by Major Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 2,646	$ 686	$ 5,376	$ 4,760
AI-based products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,496	549	4,873	3,439
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 150	$ 137	$ 503	$ 1,321