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GEOGRAPHIC INFORMATION (Tables)
12 Months Ended
Dec. 31, 2019
Segment Reporting [Abstract]  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
The following table presents summary geographic information about revenues and long-lived assets (land and property, net of accumulated depreciation) attributed to countries based upon location of our customers or assets:

   

Year ended December 31,

   

December 31,

 
   

2019

   

2018

   

2019

   

2018

 
                   

Long-lived

   

Long-lived

 
   

Revenues

   

Revenues

   

Assets

   

Assets

 

United States

  $ 5,809,000     $ 7,377,000     $ 2,411,000     $ 2,679,000  

South Korea

    650,000       509,000       -       -  

China

    228,000       237,000       789,000       831,000  

Taiwan

    45,000       55,000       186,000       200,000  

Other foreign countries

    51,000       44,000       -       -  

Total

  $ 6,783,000     $ 8,222,000     $ 3,386,000     $ 3,710,000