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Note 3 - Inventory (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
2015
   
2014
 
                 
Inventory - finished goods
  $ 290,623     $ 263,027  
Inventory - parts
    87,450       92,744  
Gross inventory
    378,073       355,771  
Provision for losses and obsolescence
    (93,165 )     (83,900 )
Net inventory
  $ 284,908     $ 271,871