Property, Plant and Equipment

9 Months Ended

Sep. 30, 2021

Property Plant And Equipment [Abstract]

8. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following:


	As of			As of
(In thousands)	September 30, 2021			December 31, 2020
Land	$	4,575		$	4,575
Building and land improvements		34,995			35,142
Building		68,156			68,169
Furniture and fixtures		19,925			19,965
Computer hardware and software		71,615			70,942
Engineering and other equipment		134,689			132,920
Total property, plant and equipment		333,955			331,713
Less: accumulated depreciation		(277,399	)		(269,314	)
Total property, plant and equipment, net	$	56,556		$	62,399

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. Due to the current economic environment, particularly related to COVID-19, the Company assessed impairment triggers related to long-lived assets during the third quarters of 2021 and 2020. As a result, no impairment test of long-lived assets was performed as of September 30, 2021 and 2020, and no impairment losses of long-lived assets were recorded during the three or nine months ended September 30, 2021 and 2020.

Depreciation expense was $3.0 million and $3.1 million for the three months ended September 30, 2021 and 2020 respectively, and $9.1 million for both the nine months ended September 30, 2021 and 2020, which is recorded in cost of revenue, selling, general and administrative expenses and research and development expenses in the Condensed Consolidated Statements of Income (Loss).