Note 2 - Liquidity (Details Textual) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Cash and Cash Equivalent | $ 2,679 | $ 3,100 |
| Short-Term Investments | 3,903 | 15,108 |
| Working Capital (Deficit) | 9,500 | |
| Retained Earnings (Accumulated Deficit) | $ (262,030) | $ (250,870) |
| X | ||||||||||
- Definition Represents the amount of working capital (deficit). No definition available.
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| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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