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Note 9 - Convertible Notes
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Long-term Debt [Text Block]
NOTE
9
– CONVERTIBLE NOTES
 
Loans and convertible notes payable consist of the following:
 
   
March 31,
2018
   
December 31,
2017
 
                 
Convertible note payable, bearing interest at 7% per annum with conversion rights for 335,833 common shares. This is due on demand.
  $
856,815
    $
880,567
 
                 
Convertible notes payable to multiple private investors bearing an interest at 5% annum with conversion rights for 2,087,741 common shares, maturing at various dates between May 2018 and February 2020.
   
3,385,406
     
2,789,605
 
                 
Total loans and convertible notes payable
   
4,242,221
     
3.670,172
 
                 
Less current portion
   
2,001,702
     
1,461,979
 
                 
Loans and convertible notes payable, less current portion
  $
2,240,519
    $
2,208,193
 
 
These notes
may
be converted at the option of the note holder at any time after registration of CEN’s common stock upon written notice by the note holder. These notes are convertible into a total of
2,423,574
common shares.