RESTRICTED CASH (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 40,562	$ 5,580
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	41,060	22,006	$ 22,511
Discontinued Operations
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	0	15,460
Discontinued Operations | Other Current Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	183
Discontinued Operations | Other Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	569
Continuing Operations
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	40,562	5,580
Continuing Operations | Prepaid Expenses and Other Current Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	146	112
Continuing Operations | Other Noncurrent Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 352	$ 102