PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total	$ 2,509	$ 2,509
Less: accumulated depreciation	(1,984)	(1,969)
Net property, plant and equipment	525	540
Building and improvements
Property, Plant and Equipment [Line Items]
Total	1,273	1,273
Scientific equipment
Property, Plant and Equipment [Line Items]
Total	597	597
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total	106	106
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total	274	274
Land and improvements
Property, Plant and Equipment [Line Items]
Total	162	162
Other personal property
Property, Plant and Equipment [Line Items]
Total	70	70
Office equipment
Property, Plant and Equipment [Line Items]
Total	$ 27	$ 27