Property, Plant and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment

Property, Plant and Equipment

8.  Property, Plant and Equipment

Property, plant and equipment at December 31, 2020 and 2019 consists of the following (in thousands):

	December 31, 2020		December 31, 2019
Land		1,165		—
Leasehold improvements	$	1,121	$	862
Software, machinery and equipment		94,449		31,514
Property, plant, and equipment		96,735		32,376
Less: accumulated depreciation		(22,186)		(17,417)
Property, plant, and equipment, net	$	74,549	$	14,959

Depreciation expense related to property, plant and equipment was $4.8 million, $3.6 million, and $2.6 million for the years ended December 31, 2020, 2019, and 2018, respectively.