Property, plant and equipment

12 Months Ended

Dec. 31, 2021

Property, plant and equipment

Property, plant and equipment

Note 5 - Property, plant and equipment

Elements of property, plant and equipment are as follows:

					Estimated
December 31,	2021		2020		Lives
(in thousands)
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		3,099		3,072	25-39 years
- Cylinders		13,272		13,624	15-30 years
- Equipment		26,653		25,138	3-10 years
- Equipment under capital lease		315		315	5-7 years
- Vehicles		1,773		1,537	3-5 years
- Lab and computer equipment, software		3,103		3,103	2-8 years
- Furniture & fixtures		837		679	5-10 years
- Leasehold improvements		852		852	3-5 years
- Equipment under construction		930		944
Subtotal		53,854		52,284
Accumulated depreciation		33,761		30,374
Total	$	20,093	$	21,910

Depreciation expense for the years ended December 31, 2021 and 2020 was $3.4 million and $3.2 million, respectively, of which $1.9 million and $1.7 million, respectively, were included as cost of sales in the Company’s Consolidated Statements of Operations.