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PROPERTY, PLANT AND EQUIPMENT
 3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT

7. PROPERTY, PLANT AND EQUIPMENT

 

Property, plant and equipment are summarized below:

 

    March 31,     December 31,  
    2021     2020  
Machinery and equipment   $ 1,176     $ 1,210  
Furniture and fixtures     205       205  
Computer hardware and software     539       669  
Leasehold improvements     313       337  
      2,233       2,421  
Less: Accumulated depreciation     (1,839 )     (1,988 )
Total property, plant and equipment, net   $ 394     $ 433  

 

Depreciation expense was $37 and $58 for the period ended March 31, 2021 and 2020, respectively.