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Note 10 - Stock Options and Stock Purchase Warrants (Tables)
 12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
    Number
of Shares		   Weighted
Average
Exercise
Price
Outstanding, January 1, 2014     202,500     $
3.07
  
Granted     100,000      
5.72
  
Exercised     -          
Forfeited or expired     -       -  
Outstanding, December 31, 2014     302,500     $ 3.95  
Granted     10,000       5.64  
Exercised     -          
Forfeited or expired     (2,500 )     5.60  
Outstanding, December 31, 2015     310,000     $ 4.01