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Summary of Significant Accounting Policies and New Accounting Standards (Detail Textuals) - Accounts Receivable - Customer | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Significant Accounting Policies And New Accounting Standards [Line Items] |  |
Number of largest customers | 10 | 10
Percentage of accounts receivable | 24.00% | 21.00%

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