Property, Plant and Equipment, Net

3 Months Ended

12 Months Ended

Mar. 31, 2022

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

Property, plant and equipment, net consists of the following as of March 31, 2022 and December 31, 2021:

	As of
	March 31, 2022		December 31, 2021
	(In thousands)
Leasehold improvements	$	23,724	$	23,501
Machinery and equipment	60,005		59,358
Aircraft	8,000		8,000
IT software and equipment	22,747		22,397
Construction in progress	26,942		23,167
	141,418		136,423
Less: accumulated depreciation and amortization	(77,915)		(74,998)
Property, plant and equipment, net	$	63,503	$	61,425

Depreciation expense recorded in the condensed consolidated statements of operations and comprehensive loss during the three months ended March 31, 2022 and 2021 consisted of the following:

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Cost of revenue	$	249	$	—
Research and development, net	130		874
Selling, general and administrative	2,423		2,249
Total depreciation expense	$	2,802	$	3,123

The Company’s capitalized software totaled $0.7 million and $0.8 million, net of accumulated amortization of $7.5 million and $7.4 million, as of March 31, 2022 and December 31, 2021, respectively. No amortization expense is recorded until the software is ready for its intended use. For the three months ended March 31, 2022 and 2021, amortization expense related to capitalized software was $0.1 million and $0.2 million, respectively.

Property, Plant and Equipment, Net

Property, plant and equipment, net consists of the following as of December 31, 2021, and December 31, 2020:

	As of
	December 31, 2021		December 31, 2020
	(In thousands)
Leasehold improvements	$	23,501	$	20,769
Machinery and equipment	59,358		50,285
Aircraft	8,000		8,000
IT software and equipment	22,397		20,190
Construction in progress	23,167		11,898
	136,423		111,142
Less: accumulated depreciation and amortization	(74,998)		(62,039)
Property, plant and equipment, net	$	61,425	$	49,103

Depreciation expense recorded in the consolidated statements of operations and comprehensive loss during the years ended December 31, 2021 and 2020 consisted of the following:

	Years Ended December 31,
	2021		2020
	(In thousands)
Cost of revenue	$	556	$	—
Research and development, net	1,348		9,333
Selling, general and administrative	10,385		2,855
Total depreciation expense	$	12,289	$	12,188

The Company’s capitalized software totaled $0.8 million and $0.9 million, net of accumulated amortization of $7.4 million and $6.7 million, as of December 31, 2021 and December 31, 2020, respectively. No amortization expense is recorded until the software is ready for its intended use. For the years ended December 31, 2021 and 2020, amortization expense related to capitalized software was $0.7 million and $1.0 million, respectively.