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Note 13 - Geographic Sales Information
12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Segment Reporting Disclosure [Text Block]
13.
Geographic Sales Information
 
The United States was the only country to contribute more than
10
percent of total revenues in each fiscal year. The Company’s revenues are substantially denominated in U.S. dollars and are summarized geographically as follows:
 
   
Year ended December 31,
 
   
2018
   
2017
 
United States
  $
14,783
    $
24,569
 
All other countries
   
13,373
     
17,235
 
Total
  $
28,156
    $
41,804