Property, Plant and Equipment

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

8. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following:


	As of			As of
(In thousands)	March 31, 2022			December 31, 2021
Land	$	4,575		$	4,575
Building and land improvements		35,667			35,578
Building		68,161			68,157
Furniture and fixtures		19,956			19,917
Computer hardware and software		73,440			72,274
Engineering and other equipment		134,438			134,771
Total property, plant and equipment		336,237			335,272
Less: accumulated depreciation		(281,853	)		(279,506	)
Total property, plant and equipment, net	$	54,384		$	55,766

Long-lived assets used in operations are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable and the undiscounted cash flows estimated to be generated by the asset are less than the asset’s carrying value. No impairment charges were recognized during the three months ended March 31, 2022 and 2021.

Depreciation expense was $2.8 million and $3.1 million for the three months ended March 31, 2022 and 2021 respectively, which is recorded in cost of revenue, selling, general and administrative expenses and research and development expenses in the Condensed Consolidated Statements of (Loss) Income.