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Stock Options (Nonvested Option Activity) (Details) - $ / shares | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Stock Options [Abstract] |  |
Non-vested (in shares) | 794,334 | 1,460,000
Vested (in shares) | (354,668) | (515,666)
Forfeited (in shares) | (51,000) | (150,000)
Non-vested (in shares) | 388,666 | 794,334
Non-vested, weighted average grant date fair value (in dollars per share) | $ 1.22 | $ 1.23
Vested, weighted average grant date fair value (in dollars per share) | 1.26 | 1.20
Forfeited, weighted average grant date fair value (in dollars per share) | 1.34 | 1.38
Non-vested, weighted average grant date fair value (in dollars per share) | $ 1.17 | $ 1.22

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