Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Property, plant and equipment, net, consisted of the following:


(in thousands)	September 30, 2021		December 31, 2020
Land	$	13,450	$	13,450
Buildings	73,285		70,381
Machinery, equipment and fixtures	82,596		77,854
Computer software	24,223		23,644
Construction in progress	8,887		11,254
	202,441		196,583
Less: accumulated depreciation and amortization	(86,000)		(76,412)
Total property, plant and equipment, net	$	116,441	$	120,171

Depreciation and amortization expense related to property, plant and equipment, net, was $3.6 million and $3.4 million for the three months ended September 30, 2021 and 2020, respectively, and $9.8 million and $9.1 million for the nine months ended September 30, 2021 and 2020, respectively.

The Company tests long-lived assets for recoverability whenever events or changes in circumstances suggest that the carrying value of an asset or group of assets may not be recoverable. During the three months ended September 30, 2021, the Company reviewed certain facts relating to an asset group that included the right-of-use (“ROU”) asset associated with the lease of office space in the World Trade Center (the “WTC lease”) in New York City and resulted in a change to the asset group due to the negotiation of a sublease. Please refer to Note 16, “Leases” for further details.

During the three months ended March 31, 2020, as a result of a decline in expected future cash flows and the effect of the COVID-19 pandemic related to certain other nuclear legacy manufacturing assets, the Company determined certain impairment triggers had occurred. Accordingly, the Company performed an undiscounted cash flow analysis as of March 31, 2020. Based on the undiscounted cash flow analysis, the Company determined that the manufacturing assets had net carrying values that exceeded their estimated undiscounted future cash flows. The Company then estimated the fair values of the asset group based on their discounted cash flows. The carrying value exceeded the fair value and as a result, the Company recorded a non-cash impairment of $7.3 million for the nine months ended September 30, 2020 in cost of goods sold in the condensed consolidated statements of operations.