OPERATING SEGMENTS - Disclosure of detailed information about revenues, geographic information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Revenue	$ 217,387	$ 401,177
Percentage of entity's revenue	100.00%	100.00%
United States [Member]
Disclosure of operating segments [line items]
Revenue	$ 188,531	$ 358,993
Percentage of entity's revenue	87.00%	90.00%
Europe [Member]
Disclosure of operating segments [line items]
Revenue	$ 19,074	$ 21,832
Percentage of entity's revenue	9.00%	5.00%
Other [Member]
Disclosure of operating segments [line items]
Revenue	$ 9,782	$ 20,352
Percentage of entity's revenue	4.00%	5.00%

Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details