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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
PROPERTY, PLANT AND EQUIPMENT      
Total $ 31,475   $ 29,757
Less accumulated depreciation (7,405)   (7,141)
Total property, plant and equipment 24,070   22,616
Depreciation expense 264 $ 248  
Cost of product sales      
PROPERTY, PLANT AND EQUIPMENT      
Depreciation expense 104 $ 106  
Land      
PROPERTY, PLANT AND EQUIPMENT      
Total 14,518   12,968
Buildings and leasehold improvements      
PROPERTY, PLANT AND EQUIPMENT      
Total 10,828   10,700
Vehicles      
PROPERTY, PLANT AND EQUIPMENT      
Total 1,664   1,664
Machinery and equipment      
PROPERTY, PLANT AND EQUIPMENT      
Total 4,167   4,127
Furniture and fixtures      
PROPERTY, PLANT AND EQUIPMENT      
Total $ 298   $ 298