Property and Equipment

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property and Equipment

4. Property and Equipment

Property and equipment consisted of the following as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021			2020
Furniture and fixtures	$	1,709		$	1,349
Office equipment		3,525			280
Capitalized software		98			0
Machinery and lab equipment		56,076			41,919
Leasehold improvements		15,529			14,295
Construction in progress		7,878			4,031
		84,815			61,874
Less accumulated depreciation		(43,490	)		(30,013	)
	$	41,325		$	31,861

Depreciation expense for the years ended December 31, 2021, 2020 and 2019 was $8.3 million, $7.0 million and $7.0 million, respectively.