Property, plant and equipment (Tables)

6 Months Ended

Jun. 30, 2022

Property, plant and equipment

Schedule of elements of property, plant and equipment

Elements of property, plant and equipment are as follows:

	June 30,		December 31,		Estimated
	2022		2021		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		3,099		3,099	25-39 years
- Cylinders		13,269		13,272	15-30 years
- Equipment		26,505		26,653	3-10 years
- Equipment under capital lease		315		315	5-7 years
- Vehicles		1,773		1,773	3-5 years
- Lab and computer equipment, software		3,103		3,103	2-8 years
- Furniture & fixtures		840		837	5-10 years
- Leasehold improvements		852		852	3-5 years
- Equipment under construction		1,791		930
Subtotal		54,567		53,854
Accumulated depreciation		35,380		33,761
Total	$	19,187	$	20,093