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FAIR VALUE (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Amounts included in:    
Restricted cash $ 5,900 $ 6,200
Recurring Basis    
Assets    
Money Market Funds – JPMorgan Chase, US 5,089 5,000
Interest bearing deposits – various banks 9,708 8,962
Amounts included in:    
Cash and cash equivalents 9,740 8,636
Restricted cash 679 679
Long-term restricted cash 4,378 4,647
Total 14,797 13,962
Recurring Basis | Level 1    
Assets    
Money Market Funds – JPMorgan Chase, US 5,089 5,000
Interest bearing deposits – various banks 9,708 8,962
Amounts included in:    
Cash and cash equivalents 9,740 8,636
Restricted cash 679 679
Long-term restricted cash 4,378 4,647
Total 14,797 13,962
Recurring Basis | Level 2    
Assets    
Money Market Funds – JPMorgan Chase, US 0 0
Interest bearing deposits – various banks 0 0
Amounts included in:    
Cash and cash equivalents 0 0
Restricted cash 0 0
Long-term restricted cash 0 0
Total 0 0
Recurring Basis | Level 3    
Assets    
Money Market Funds – JPMorgan Chase, US 0 0
Interest bearing deposits – various banks 0 0
Amounts included in:    
Cash and cash equivalents 0 0
Restricted cash 0 0
Long-term restricted cash 0 0
Total $ 0 $ 0