REVENUES FROM CONTRACTS WITH CUSTOMERS (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 200,000		$ 200,000		$ 200,000
Deferred revenue	100,000	$ 200,000	400,000	$ 500,000
Cash deposits	100,000	$ 200,000	300,000	$ 300,000
Contract assets	0		0		$ 0
Affiliated Entity | Expense Support Agreement | MCC
Disaggregation of Revenue [Line Items]
ESA expenses	$ 400,000		$ 700,000