GEOGRAPHIC AND SEGMENT INFORMATION (Details)	9 Months Ended
Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Number of reportable operating segment \| segment	3
Long-term assets	$ 24,778,000		$ 25,778,000
Revenues	0	$ 0
United States
Long-term assets	$ 24,800,000		$ 25,800,000
Percentage of assets (as a percent)	100.00%

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.

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+ Details