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Note 4 - Earnings Per Common Share (Tables)
 9 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Nine Months Ended
  
   
March 31
    
March 31
  
   
2019
    
2018
    
2019
    
2018
  
                                 
BASIC EARNINGS PER SHARE
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
                                 
Net (loss) income
   $
(3,168
)
   $
220
     $
(17,201
)
   $
(16,877
)
                                 
Weighted average shares outstanding during the period, net of treasury shares (a)
    
25,893
      
25,581
      
25,828
      
25,546
  
Weighted average vested restricted stock units outstanding
    
33
      
49
      
40
      
44
  
Weighted average shares outstanding in the Deferred Compensation Plan during the period
    
206
      
245
      
215
      
245
  
Weighted average shares outstanding
    
26,132
      
25,875
      
26,083
      
25,835
  
                                 
Basic (loss) earnings per share
   $
(0.12
)
   $
0.01
     $
(0.66
)
   $
(0.65
)
                                 
DILUTED EARNINGS PER SHARE
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
                                 
Net (loss) income
   $
(3,168
)
   $
220
     $
(17,201
)
   $
(16,877
)
                                 
Weighted average shares outstanding
                                
Basic
    
26,132
      
25,875
      
26,083
      
25,835
  
                                 
Effect of dilutive securities (b):                                
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any
    
--
      
562
      
--
      
--
  
                                 
Weighted average shares outstanding (c)
    
26,132
      
26,437
      
26,083
      
25,835
  
                                 
Diluted (loss) earnings per share
   $
(0.12
)
   $
0.01
     $
(0.66
)
   $
(0.65
)