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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of the components of inventories

The components of inventories are summarized below: 

 

    March 31,     December 31,  
    2020     2019  
Raw materials   $ 2,341     $ 2,309  
Work in process     2,928       2,628  
Finished goods           46  
Provision for excess and obsolete inventory     (616 )     (429 )
Total inventories   $ 4,653     $ 4,554