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Common Stock and Common Stock Equivalents (Schedule of summarizes stock option activity) (Details) - $ / shares
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Common Stock And Common Stock Equivalents Abstract    
Options outstanding at beginning of the year 0 28,000
Options granted 0 0
Options canceled or expired 0 28,000
Options outstanding at end of the year 0 0
Options exercisable at end of the year 0 0
Weighted average exercise price outstanding, at beginning of the year   $ 7.8