FAIR VALUE (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents	$ 17,571	$ 14,563
Restricted cash	28,375	39,991
Prepaid expenses and other current assets	2,461	2,352
Financial Liabilities [Abstract]
Accrued expenses	10,605	11,771
Other short term liabilities	2,324	558
Credit facility	48,769	52,593
Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	17,571	14,563
Restricted cash	28,375	39,991
Prepaid expenses and other current assets	2,461	2,352
Financial Liabilities [Abstract]
Accrued expenses	10,605	11,771
Other short term liabilities	2,324	558
Credit facility	43,096	47,200
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	17,571	14,563
Restricted cash	28,375	39,991
Prepaid expenses and other current assets	0	0
Financial Liabilities [Abstract]
Accrued expenses	0	0
Other short term liabilities	0	0
Credit facility	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	0	0
Restricted cash	0	0
Prepaid expenses and other current assets	2,461	2,352
Financial Liabilities [Abstract]
Accrued expenses	10,605	11,771
Other short term liabilities	2,324	558
Credit facility	43,096	47,200
Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	0	0
Restricted cash	0	0
Prepaid expenses and other current assets	0	0
Financial Liabilities [Abstract]
Accrued expenses	0	0
Other short term liabilities	0	0
Credit facility	$ 0	$ 0