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

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

	June 30, 2019			December 31, 2018
Land	$	1,747		$	1,747
Buildings and improvements		17,566			17,520
Machinery and equipment		29,830			29,692
Vehicles		806			937
Office equipment		850			838
Construction in process		583			546
		51,382			51,280
Less accumulated depreciation		(28,017	)		(26,707	)
Total property, plant and equipment, net	$	23,365		$	24,573