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13 - GEOGRAPHIC INFORMATION (Tables)
12 Months Ended
Dec. 31, 2018
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,

 
   

2018

   

2017

   

2018

   

2017

 
                   

Long-lived

   

Long-lived

 
   

Revenues

   

Revenues

   

Assets

   

Assets

 

United States

  $ 7,377,000     $ 6,803,000     $ 2,679,000     $ 2,788,000  

South Korea

    509,000       455,000       -       -  

China

    237,000       296,000       831,000       875,000  

Taiwan

    55,000       17,000       200,000       203,000  

Other foreign countries

    44,000       51,000       -       -  

Total

  $ 8,222,000     $ 7,622,000     $ 3,710,000     $ 3,866,000