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Note 12 - Supplemental Cash Flow Information (Tables)
 12 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
(In thousands)
  
201
8
    
2017
    
2016
  
Cash payments for:
                        
Interest
  
$
1,582
     $
529
     $
50
  
Income taxes
  
$
1,854
     $
2,618
     $
5,079
  
                         
Non-cash investing and financing activities
                        
Issuance of common shares as compensation
  
$
319
     $
409
     $
248
  
Issuance of stock warrants
  
 
—
      
575
    
 
—
  
Issuance of common shares to fund deferred compensation plan
  
$
429
     $
—
     $
—