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

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

	March 31, 2019			December 31, 2018
Land	$	1,747		$	1,747
Buildings and improvements		17,566			17,520
Machinery and equipment		29,744			29,692
Vehicles		828			937
Office equipment		838			838
Construction in process		527			546
		51,250			51,280
Less accumulated depreciation		(27,291	)		(26,707	)
Total property, plant and equipment, net	$	23,959		$	24,573