COMMITMENTS AND CONTINGENCIES - Maturity analysis of operating leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
COMMITMENTS AND CONTINGENCIES
2020	$ 214
2021	152
2022	111
2023	40
2024	3
Total	520
Discount	(31)
Lease liability	$ 489	$ 500
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent us-gaap:OtherLiabilitiesNoncurrent	us-gaap:AccruedLiabilitiesCurrent us-gaap:OtherLiabilitiesNoncurrent
Current lease liability	$ (197)
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current
Non-current lease liability	$ 292
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
2019			$ 100
2020			100
2021			100
2022			$ 100