OTHER BENEFITS (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Employer matching contribution to defined contribution plan (as a percent)	0.00%	0.00%
Danish Subsidiary
Employer matching contribution to defined contribution plan (as a percent)	0.00%
Costs for employee health insurance benefits	$ 0	$ 0

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration