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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
PROPERTY, PLANT AND EQUIPMENT          
Total $ 32,087   $ 32,087   $ 29,757
Less accumulated depreciation (7,665)   (7,665)   (7,141)
Total property, plant and equipment 24,422   24,422   22,616
Depreciation expense 261 $ 252 524 $ 501  
Cost of product sales          
PROPERTY, PLANT AND EQUIPMENT          
Depreciation expense 109 $ 98 214 $ 203  
Land          
PROPERTY, PLANT AND EQUIPMENT          
Total 14,715   14,715   12,968
Buildings and leasehold improvements          
PROPERTY, PLANT AND EQUIPMENT          
Total 10,975   10,975   10,700
Vehicles          
PROPERTY, PLANT AND EQUIPMENT          
Total 1,682   1,682   1,664
Machinery and equipment          
PROPERTY, PLANT AND EQUIPMENT          
Total 4,417   4,417   4,127
Furniture and fixtures          
PROPERTY, PLANT AND EQUIPMENT          
Total $ 298   $ 298   $ 298