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Stock-based Compensation (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Stock based compensation expense | $ 133,663 | $ 189,639
Deferred tax benefit related to stock based compensation | 6,901 | $ 10,516
Unrecognized compensation costs | $ 84,935 |
Period in which compensation cost will be recognized | 1 year 6 months |
Deferred tax benefit related to unrecognized compensation costs | $ 4,619 |
Outstanding | 304,662 | 276,712
Dividends paid per share | $ 0.50 | $ 1.00
Aggregate intrinsic value of options exercised | $ 0 | $ 263
2017 Plan [Member] | Non-employee Director [Member] | Upper Range [Member] |  |
Percentage of total number of shares subject to options or awards, single fiscal year | 33.33% |
Number of shares subject to option or award, single fiscal year | 13,300 |
Number of shares authorized | 133,000 |
2017 Plan [Member] | Individual Employee [Member] | Upper Range [Member] |  |
Number of shares subject to option or award, single fiscal year | 15,000 |
Non-qualified stock options [Member] |  |
Stock based compensation expense | $ 32,863 | $ 50,075
Unrecognized compensation costs | 62,941 |
Incentive Stock Options [Member] |  |
Unrecognized compensation costs | $ 21,994 |
Stock Options [Member] | 2017 Plan [Member] |  |
Vesting period | 2 years |
Expiration period | 10 years |
Number of shares authorized | 400,000 |
Granted | 226,354 |
Stock Options [Member] | 2007 Plan [Member] |  |
Outstanding | 117,650 |

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