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Note 4 - Debt (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
September 30
   
June 30
   
December 31
 
   
2018
   
2018
   
2017
 
                         
Term loan
  $
-
    $
2,355,861
    $
2,545,421
 
Revolving line of credit
   
-
     
500,000
     
500,000
 
     
-
     
2,855,861
     
3,045,421
 
Less current portion
   
-
     
2,855,861
     
3,045,421
 
Total long-term debt
  $
-
    $
-
    $
-