Property, Plant and Equipment

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Note 5 - Property, Plant and Equipment

The components of property, plant and equipment are as follows (in thousands):

	March 31, 2022			December 31, 2021			Estimated Useful Life
Land	$	352		$	352
Building improvements		1,729			1,729		10-39 years
Machinery		4,740			4,740		3-7 years
Lab equipment		4,936			4,330		3-7 years
Computer equipment		1,589			1,211		3-5 years
Furniture and fixtures		468			468		5 years
		13,814			12,830
Less: accumulated depreciation		(7,374	)		(6,883	)
Total property, plant and equipment, net	$	6,440		$	5,947

Depreciation expense incurred for the three months ended March 31, 2022 and 2021 was $491,000 and $428,000, respectively.