Plant, Property and Equipment, Net
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Plant, Property and Equipment, Net
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net consisted of the following at December 31:
(In thousands)

2017
 
2016
Buildings and improvements

$
5,197

 
$
5,230

Machinery and equipment

5,556

 
4,422

Furniture, fixtures and office equipment

4,895

 
3,721

Property, plant and equipment, gross

15,648

 
13,373

Less: accumulated depreciation and amortization

(11,915
)
 
(10,312
)
Property, plant and equipment, net

$
3,733

 
$
3,061


Depreciation expense of property, plant and equipment was $1.7 million, $1.9 million and $3.1 million in 2017, 2016, and 2015, respectively.