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Foreign Operations (Tables) | 12 Months Ended
--- | ---
Jun. 30, 2021
Foreign Currency [Abstract] |
Assets and net assets in foreign countries |
|  | China |  | Latvia
|  | June 30, 2021 |  | June 30, 2020 |  | June 30, 2021 |  | June 30, 2020
Assets |  | $20.1 million |  | $19.0 million |  | $11.3 million |  | $9.8 million
Net assets |  | $16.6 million |  | $16.2 million |  | $9.0 million |  | $8.2 million

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