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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Year Ended December 31,
 
   
2015
   
2014
 
                 
Basic and diluted
    18,839,206       18,768,693  
Potentially dilutive
    20,997       63,724