4. Property, Plant and Equipment, net (Tables)

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consisted of the following:

	March 31, 2021			December 31, 2020
Land	$	1,565		$	1,565
Buildings and improvements		17,182			17,834
Machinery and equipment		31,716			31,707
Vehicles		778			778
Office equipment		862			857
Construction in process		587			228
		52,690			52,969
Less accumulated depreciation		(31,946	)		(31,921	)
Total property, plant and equipment, net	$	20,744		$	21,048