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Summary of Significant Accounting Policies - Additional Information (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) item shares | Dec. 31, 2020 USD ($) shares | Jun. 30, 2021 USD ($)
FDIC insured amount | $ | $ 250,000 |  | $ 250,000 |  |
Number of revenue sources | item | 2 |  | 2 |  |
Foreign currency transaction gain (loss) | $ | $ (11,982) | $ 17,469 | $ (23,225) | $ 41,718 |
Restricted Common Stock [Member] |  |  |  |  |
Antidilutive securities amount | shares |  |  | 345,726 | 250,553 |
Europe financial institutions |  |  |  |  |
Deposits | $ | $ 568,209 |  | $ 568,209 |  | $ 138,488
Employee stock options |  |  |  |  |
Antidilutive securities amount | shares |  |  | 3,272,850 | 3,564,018 |
Employee stock options | Warrant |  |  |  |  |
Antidilutive securities amount | shares |  |  |  | 320,000 |

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