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Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Assets Measured on Recurring Basis (Details) - USD ($) | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | ---
Revenues in excess of billings - long term | $ 957,603 | $ 1,300,289
Total | 957,603 | 1,300,289
Level 1 [Member] |  |
Revenues in excess of billings - long term |  |
Total |  |
Level 2 [Member] |  |
Revenues in excess of billings - long term |  |
Total |  |
Level 3 [Member] |  |
Revenues in excess of billings - long term | 957,603 | 1,300,289
Total | $ 957,603 | $ 1,300,289

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