Note 9 - Convertible Notes (Details Textual) - USD ($) $ in Thousands, shares in Millions		6 Months Ended
Mar. 13, 2026	Jun. 30, 2026	Jun. 30, 2025
Conversion of Debt into Common Stock [Member]
Debt Conversion, Original Debt, Amount	$ 700
Debt Conversion, Converted Instrument, Shares Issued (in shares)	3.3
Convertible Debt [Member]
Repayments of Convertible Debt		$ 50
Interest Expense, Debt		100	$ 100
Convertible Debt [Member] \| Conversion of Debt into Common Stock [Member]
Debt Conversion, Original Debt, Amount		$ 100	$ 400
Debt Conversion, Converted Instrument, Shares Issued (in shares)		0.8	2.8
Convertible Debt [Member] \| Conversion of Debt into Common Stock [Member] \| Related Party [Member]
Debt Conversion, Original Debt, Amount			$ 200
Convertible Debt [Member] \| Conversion of Outstanding Principal and Accrued Interest into Unregistered Shares [Member]
Debt Conversion, Original Debt, Amount		$ 700
Convertible Debt [Member] \| Conversion and Payment of Interest-in-kind on Convertible Debt [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)		0.4	0.4
Debt Conversion, Converted Instrument, Amount		$ 100	$ 100

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

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- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

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