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Organization and Summary of Significant Accounting Policies (Details 3) - USD ($)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Class of Stock [Line Items]    
Stock-based compensation expense $ 869,000 $ 1,100,000
Amortization of restricted stock 515,000 589,000
Accrued liability, post retirement benefits $ 196,000 $ 204,000
Common Stock    
Class of Stock [Line Items]    
Stock repurchased during period (in shares) 51,999  
Stock repurchased during period (in dollars per share) $ 19.74  
Shares Paid for Tax Withholding for Share Based Compensation 21,071  
Remaining available future stock repurchase 321,001