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Organization and Summary of Significant Accounting Policies (Stock-based Compensation) (Details) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Accounting Policies [Abstract]      
Stock-based compensation expense $ 1,100,000 $ 1,500,000 $ 1,100,000
Total cash provided by (used for) operating activities or financing activities related to tax effect from stock-based compensation     $ 0