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Note 7 - Investments (Tables) | 12 Months Ended
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Jun. 30, 2025
Notes Tables |
Investment [Table Text Block] |
|  | June 30, 2025 |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Due within one year |  | $ | 59,952 |  |  | $ | 66 |  |  | $ | (63 | ) |  | $ | 59,955 |
Due within one and two years |  |  | 59,941 |  |  |  | 95 |  |  |  | (6 | ) |  |  | 60,030 |
Total |  | $ | 119,893 |  |  | $ | 161 |  |  | $ | (69 | ) |  | $ | 119,985 |
|  | June 30, 2024 |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Due within one year |  | $ | 89,997 |  |  | $ | 1,322 |  |  | $ | - |  |  | $ | 91,319 |
Due within one and two years |  |  | 34,894 |  |  |  | - |  |  |  | (122 | ) |  |  | 34,772 |
Total |  | $ | 124,891 |  |  | $ | 1,322 |  |  | $ | (122 | ) |  | $ | 126,091 |

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org/321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org/325/tableOfContent + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration