Quarterly report pursuant to Section 13 or 15(d)

SELECTED FINANCIAL STATEMENT CAPTIONS - ASSETS (Details)

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SELECTED FINANCIAL STATEMENT CAPTIONS - ASSETS (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Inventory Net [Abstract]      
Raw materials and components $ 1,409 $ 1,187  
Work-in-process 1,851 1,629  
Finished goods 5,109 5,204  
Inventory reserve (114) (49)  
Total $ 8,255 $ 7,971 $ 5,795