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RELATED PARTY TRANSACTIONS - Accounts (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) customer	Sep. 30, 2019 customer	Sep. 30, 2020 USD ($) customer	Sep. 30, 2019 customer	Dec. 31, 2019 USD ($) customer
RELATED PARTY TRANSACTIONS
Accounts receivable from related parties	$ 2		$ 2
Number of related party customers | customer	1	1	1	1	1
Accounts payable with related parties	$ 0		$ 0		$ 0

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