PROPERTY, PLANT AND EQUIPMENT

9 Months Ended

Sep. 30, 2018

PROPERTY, PLANT AND EQUIPMENT [Abstract]

PROPERTY, PLANT AND EQUIPMENT

6.  PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following:

	September 30,			December 31,
	2018			2017
Land	$	2,256		$	2,259
Buildings and improvements		30,572			30,761
Machinery and equipment		124,160			122,773
Construction in progress		4,133			1,511
		161,121			157,304
Accumulated depreciation		(118,128	)		(113,809	)
Property, plant and equipment, net	$	42,993		$	43,495

Depreciation expense for the three months ended September 30, 2018 and 2017 was $2.8 million and $3.6 million, respectively.  Depreciation expense for the nine months ended September 30, 2018 and 2017 was $8.9 million and $10.6 million, respectively.