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Note 14 - Variable Interest Entities ("VIE") and Transactions (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Variable Interest Entities [Table Text Block]
   
Dec. 31, 2018
   
Dec. 31, 2017
 
Current Assets
  $
490,000
    $
608,000
 
Property, plant and equipment, net
   
200,000
     
231,000
 
Other noncurrent assets
   
800,000
     
740,000
 
Total assets
  $
1,490,000
    $
1,579,000
 
                 
Mortgages and other debt payable
  $
2,133,000
    $
2,062,000
 
Total liabilities
  $
2,133,000
    $
2,062,000