Note 6 - Earnings Per Share (Tables)
 3 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Quarter Ended
 
 
 
September 30,
 
 
 
2016
 
 
2015
 
Weighted average common shares outstanding-basic
     37,281       37,169  
Dilutive effect of stock options
     192       146  
Weighted average common shares outstanding-diluted
     37,473       37,315