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Summary of Significant Accounting Policies - Exchange rates (Details) | 12 Months Ended
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Jun. 30, 2020 $ / $ € / $ | Jun. 30, 2019 $ / $ € / $
Euro to US Dollar [Member] |  |
Period end exchange rate | € / $ | 1.12 | 1.14
Average period exchange rate | € / $ | 1.14 | 1.14
Mexican Peso to US Dollar [Member] |  |
Period end exchange rate | $ / $ | 0.04 | 0.05
Average period exchange rate | $ / $ | 0.05 | 0.05

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- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901 + Details
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