4. PROPERTY, PLANT AND EQUIPMENT (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

	March 31, 2020			December 31, 2019			Range of Asset Lives
	(In thousands)
Buildings and improvements	$	285		$	285			7 - 36 years
Leasehold improvements		896			896			2 - 5 years
Equipment		17,896			17,887			2 - 30 years
Furniture, computers and office equipment		901			901			2 - 8 years
Construction in progress		116			64			–
Total property, plant and equipment		20,094			20,033
Less: Accumulated depreciation and amortization		(12,360	)		(12,069	)
Property, plant and equipment, net	$	7,734		$	7,964