PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 13,558	$ 14,525
Less: Accumulated depreciation and amortization	(11,831)	(11,921)
Property, plant and equipment, net	1,727	2,604
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 285	285
Range of Asset Lives	7 - 36 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 899	906
Range of Asset Lives	2 - 5 years
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 11,885	12,343
Range of Asset Lives	2 - 30 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 429	907
Range of Asset Lives	2 - 8 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 60	$ 84