Property and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property and Equipment

(7) Property and Equipment

Property and equipment at December 31, 2020 and 2019 are summarized as follows:

(in thousands)	2020		2019		Useful Life (in years)
Land	$	541	$	541	N/A
Building	5,422		5,093		25-30
Machinery and equipment	163,688		158,753		2-7
Capitalized software	24,814		22,928		3-5
Office furniture and equipment	5,106		4,618		1-5
Leasehold improvements	32,349		33,444		Life of lease a
Construction in progress	4,910		9,944		N/A
Total property and equipment	236,830		235,321
Less: Accumulated depreciation and amortization	(161,474)		(142,381)
Total property and equipment, net	$	75,356	$	92,940

a.Leasehold improvements are amortized on a straight-line basis over the shorter of (i) their estimated useful life, or (ii) the estimated or contractual life of the related lease.

We include all depreciation from assets attributable to the generation of revenue in the cost of sales line item in the Statement of Operations. Depreciation related to assets that are not attributable to the generation of revenue are included in the research and development and selling and general administrative line items in the Statement of Operations. Depreciation expense on property and equipment for the years ended December 31, 2020, 2019 and 2018 was $28,397, $29,982 and $29,302, respectively.

For the years ended December 31, 2020, 2019 and 2018, we recognized impairment charges of $3,406, $181 and $625, respectively, on property and equipment, net included in the selling and general administrative line item in the Statement of Operations.