CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 28,383	$ 40,562
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	28,881	41,060	$ 38,865	$ 22,006
Continuing Operations [Member] | Prepaid Expenses and Other Current Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	122	146
Continuing Operations [Member] | Other Noncurrent Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 376	$ 352