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Note 8 - Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
201
9
   
2018
 
Weighted average shares outstanding for basic calculation
 
 
14,507
     
14,531
 
Dilutive effect of restricted stock
 
 
430
     
43
 
Weighted average shares outstanding for diluted calculation
 
 
14,937
     
14,574