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Revenues in Excess of Billings - Long Term (Details Narrative) - USD ($) | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Interest income | $ 53,119 | $ 55,344
Interest rate discount |  | 4.35%
Minimum [Member] |  |
Interest rate discount | 4.65% |
Maximum [Member] |  |
Interest rate discount | 6.25% |

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