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Property, Plant & Equipment, Net
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant & Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment, net, consisted of the following:
 December 31,
(in thousands)20202019
Land$13,450 $13,450 
Buildings70,381 75,654 
Machinery, equipment and fixtures77,854 87,763 
Computer software23,644 20,739 
Construction in progress11,254 10,546 
196,583 208,152 
Less: accumulated depreciation and amortization(76,412)(91,655)
Total property, plant and equipment, net$120,171 $116,497 
Depreciation and amortization expense related to property, plant & equipment, net, was $12.5 million, $10.3 million and $10.1 million for the years ended December 31, 2020, 2019 and 2018, 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 March 31, 2020, as a result of a decline in expected future cash flows and the effect of COVID-19 related to certain other nuclear legacy manufacturing assets in the U.S. segment, 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 year ended December 31, 2020 in cost of goods sold in the consolidated statement of operations.
In connection with a contract termination in the fourth quarter of 2020, the Company transferred ownership of certain manufacturing assets and recorded a non-cash loss on disposal of assets of $1.8 million as well as paid $0.5 million, all of which is recorded in cost of goods sold in the consolidated statement of operations.