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Note 8 - Earnings Per Share (Tables)
3 Months Ended
Apr. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended April 30,
 
   
2019
   
2018
 
Basic weighted average common shares outstanding
   
7,887
     
7,718
 
Dilutive effect of equity compensation plans
   
     
 
Weighted average common shares outstanding assuming full dilution
   
7,887
     
7,718
 
                 
Stock options not included in the computation of diluted earnings per share of common stock because the option exercise prices exceeded the average market prices of the common shares
   
126
     
137
 
Stock options with an exercise price below the average market price
   
82
     
212