CONCENTRATION OF RISK - Revenues and Accounts Receivable From Our Largest Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Concentration Risk [Line Items]
Accounts Receivable	$ 96,235		$ 96,235		$ 82,261
Major Customer A [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	50.00%	41.00%	46.00%	38.00%
Major Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 10,129		$ 10,129
Major Customer B [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	27.00%	28.00%	25.00%	28.00%
Major Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 23,786		$ 23,786
Major Customer C [Member] | Total Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
% of Total Revenue	7.00%	14.00%	14.00%	17.00%
Major Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 33,520		$ 33,520