COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Commitments And Contingencies [Line Items]
Operating lease right-of-use assets	$ 639			$ 0
Operating lease, cost	$ 136
Operating lease, weighted average remaining lease term	2 years 4 months 24 days
Operating Lease Liabilities, Payments Due
2019	$ 236
2020	241
2021	149
2022	13
Total	$ 639
Chief Executive Officer
Commitments And Contingencies [Line Items]
Severance costs		$ 2,024
Accounting Standards Update 2016-02
Commitments And Contingencies [Line Items]
Operating lease right-of-use assets			$ 700
Operating lease, liability			$ 700
Minimum
Commitments And Contingencies [Line Items]
Lease, remaining lease terms	1 year
Maximum
Commitments And Contingencies [Line Items]
Lease, remaining lease terms	3 years