Note 5 - Stockholders' Equity (Details Textual) - $ / shares	1 Months Ended	3 Months Ended
Mar. 31, 2024	Feb. 29, 2024	Mar. 31, 2024	Dec. 31, 2023
Common Stock, Shares Authorized (in shares)	150,000,000		150,000,000	600,000,000
Stock Issued During Period, Shares, Issued for Services (in shares)			6,703
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)			55,422
Stock Issued During Period, Shares, Warrant Exercise (in shares)	136,000	133,032	269,032
Stock Incentive Plan 2020 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period			961
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number	133,648		133,648
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 28.39		$ 28.39
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			7 years 10 months 24 days
Common Stock, Capital Shares Reserved for Future Issuance	333,648		333,648

Number of shares issued during the period as a result of warrant exercise.

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Aggregate number of common shares reserved for future issuance.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
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-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(16)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Topic 718
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-Subparagraph (e)(1)
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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Reduction in the number of shares during the period as a result of a reverse stock split.

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