NATURE OF OPERATIONS AND GOING CONCERN, BASIS OF PRESENTATION AND RECENT ACCOUNTING PRONOUNCEMENTS - (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 13,203		$ 16,660
Operating lease right-of-use assets	1,410
Operating lease liabilities	$ 1,484
ASU No. 2016-02 | Adjustment
Operating lease right-of-use assets		$ 1,500
Operating lease liabilities		$ 1,500