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Note 3 - Basic and Diluted Shares (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
 
 
Three
Months
Ended
 
 
 
March 31
,
 
 
 
2016
 
 
2015
 
                 
Basic and diluted
    18,903,466       18,220,775  
Potentially dilutive
    22,604       47,500