Property, plant and equipment

6 Months Ended

Jun. 30, 2020

Property, plant and equipment

Property, plant and equipment

Note 4 - Property, plant and equipment

Elements of property, plant and equipment are as follows:

	June 30,		December 31,		Estimated
	2020		2019		Lives
(in thousands)	(unaudited)
Property, plant and equipment
- Land	$	1,255	$	1,255
- Land improvements		319		319	6-10 years
- Buildings		1,446		1,446	25-39 years
- Building improvements		3,072		3,045	25-39 years
- Cylinders		13,237		13,273	15-30 years
- Equipment		25,138		24,953	3-10 years
- Equipment under capital lease		315		315	5-7 years
- Vehicles		1,574		1,574	3-5 years
- Lab and computer equipment, software		3,103		3,077	2-8 years
- Furniture & fixtures		679		679	5-10 years
- Leasehold improvements		852		842	3-5 years
- Equipment under construction		451		73
Subtotal		51,441		50,851
Accumulated depreciation		29,333		27,177
Total	$	22,108	$	23,674

Depreciation expense for the six months ended June 30, 2020 and 2019 was $2.1 million for both periods.