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Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Mar. 31, 2019
Notes Tables |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] |
|  | Cumulative Effect Adjustments to Retained Earnings on July 1, 2018 Increase / (Decrease) |
Cumulative effect adjustment to retained earnings due to the adoption of the following new accounting standards: |  |  |  |
ASU 2014-09 |  | $ | 98 |
ASU 2016-01 |  |  | 27,053 |
ASU 2018-02 |  |  | (2,371 | )
Net cumulative effect adjustments to retained earnings on July 1, 2018 due to the adoption of new accounting standards |  | $ | 24,780 |

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