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STOCK-BASED COMPENSATION (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Nov. 30, 2015
Stock-based compensation        
Common stock authorized for future grants (in shares)       2,500,000
Stock-based compensation expense $ 5,730 $ 9,116 $ 6,617  
Contractual term of awards 10 years      
Minimum        
Stock-based compensation        
Continuous service period for awards to vest 1 year      
Maximum        
Stock-based compensation        
Continuous service period for awards to vest 3 years      
Stock options        
Stock-based compensation        
Stock-based compensation expense $ 68 $ 163 $ 221  
Stock options granted (in shares) 2,860      
Unrecognized compensation expense $ 100      
Weighted-average recognition period 2 years      
Key assumptions used in Black-Scholes model to determine the fair value of each stock option and SAR        
Weighted-average expected volatility (as a percent) 39.40% 34.40% 36.50%  
Weighted-average expected life (in years) 4 years 4 months 24 days 4 years 6 months 4 years 6 months  
Weighted-average dividend yield (as a percent) 0.90% 1.00% 1.10%  
Weighted-average risk free interest rate (as a percent) 0.20% 1.60% 2.70%  
Stock appreciation rights        
Stock-based compensation        
Stock-based compensation expense $ 1,677 $ 2,545 $ 2,025  
Other than options granted (in shares) 64,100      
Unrecognized compensation expense $ 2,400      
Weighted-average recognition period 1 year 9 months 18 days      
Key assumptions used in Black-Scholes model to determine the fair value of each stock option and SAR        
Weighted-average expected volatility (as a percent) 39.20% 34.60% 37.60%  
Weighted-average expected life (in years) 4 years 2 months 12 days 4 years 8 months 12 days 5 years 2 months 12 days  
Weighted-average dividend yield (as a percent) 0.90% 1.00% 1.10%  
Weighted-average risk free interest rate (as a percent) 0.20% 1.60% 2.70%  
Restricted stock        
Stock-based compensation        
Stock-based compensation expense $ 2,668 $ 5,117 $ 3,336  
Other than options granted (in shares) 26,104      
Unrecognized compensation expense $ 4,100      
Weighted-average recognition period 3 years 2 months 12 days      
Performance stock        
Stock-based compensation        
Stock-based compensation expense $ 1,317 $ 1,291 $ 1,035  
Other than options granted (in shares) 35,380      
Earn out basis if all goals are met (as a percent) 200.00%      
Unrecognized compensation expense $ 2,100      
Weighted-average recognition period 2 years 1 month 6 days      
Continuous service period for awards to vest 3 years