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PROPERTY, PLANT AND EQUIPMENT, NET
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net consisted of the following:
March 31, 2022December 31, 2021
(In thousands)
Machinery and equipment$2,076 $2,077 
Furniture and fixtures1,049 1,036 
Computer hardware and software635 614 
Leasehold improvements1,029 1,034 
4,789 4,761 
Accumulated depreciation and amortization(904)(578)
Property, plant and equipment, net$3,885 $4,183 
Total depreciation and amortization expense in the consolidated statements of operations was $335,000 and $35,000 for the three months ended March 31, 2022 and 2021, respectively. Our Intellectual Property Operations and parent company include depreciation and amortization in general and administrative expenses, and our Industrial Operations allocates depreciation and amortization to all applicable operating expense categories.