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STOCK-BASED COMPENSATION (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2021
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 $ 3,218 $ 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        
Employee stock option          
Stock-based compensation          
Stock-based compensation expense $ 28 $ 68 $ 163 $ 221  
Stock options granted (in shares) 0        
Unrecognized compensation expense $ 100        
Weighted-average recognition period 1 year 6 months        
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 (SARs)          
Stock-based compensation          
Stock-based compensation expense $ 779 $ 1,677 $ 2,545 $ 2,025  
Other than options granted (in shares) 0        
Unrecognized compensation expense $ 1,700        
Weighted-average recognition period 1 year 4 months 24 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 $ 2,006 $ 2,668 $ 5,117 $ 3,336  
Other than options granted (in shares) 50,604        
Unrecognized compensation expense $ 7,500        
Weighted-average recognition period 2 years 8 months 12 days        
Performance Shares          
Stock-based compensation          
Stock-based compensation expense $ 405 $ 1,317 $ 1,291 $ 1,035  
Other than options granted (in shares) 73,200        
Earn out basis if all goals are met (as a percent) 200.00% 200.00% 200.00% 200.00%  
Unrecognized compensation expense $ 5,100        
Weighted-average recognition period 2 years 4 months 24 days