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Note 7 - Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Jun. 30, 2017
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Unrealized Gains (Losses) on Available- for-Sale Investments |  |  | Foreign Currency Translation Adjustments |  |  | Total |
Beginning balance |  | $ | (5,542 | ) |  |  | (64,863 | ) |  | $ | (70,405 | )
Other comprehensive income (loss) |  |  | 24,531 |  |  |  | (3,061 | ) |  |  | 21,470 |
Ending balance |  | $ | 18,989 |  |  |  | (67,924 | ) |  | $ | (48,935 | )

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