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Note 8 - Convertible Notes (Details Textual) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Changes in fair value of convertible debt					$ (0)	$ 646,000
Convertible Debt [Member]
Changes in fair value of convertible debt			$ 600,000	$ 200,000
The 2020 Notes [Member]
Proceeds from Issuance of Long-Term Debt		$ 5,100,000
The 2021 Notes [Member]
Proceeds from Issuance of Long-Term Debt	$ 6,000,000

X

- Definition

Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties.

+ References

No definition available.

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X

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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