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Note 9 - Income Per Share (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
    Three Months Ended
    March 31,
    2020   2019
Basic weighted average common shares outstanding    
7,457
     
7,402
 
Weighted average common equivalent shares due to stock options and RSUs    
81
     
64
 
Diluted weighted average common shares outstanding    
7,538
     
7,466