Note 6 - Stock Based Compensation - Summary of Restricted Stock and Restricted Stock Units Activity (Details) - $ / shares	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Restricted Stock [Member]
Unvested shares, number (in shares)			0	42	42
Unvested shares, weighted average grant price (in dollars per share)			$ 0	$ 235.87	$ 235.87
Granted, number (in shares)					0
Granted, weighted average grant price (in dollars per share)
Vested, number (in shares)	(42)		(42)		(42)
Vested, weighted average grant price (in dollars per share)					$ 235.87
Unvested Shares, number (in shares)	0		0		0
Unvested Shares, weighted average grant price (in dollars per share)	$ 0		$ 0		$ 0
Unvested Shares, number (in shares)	0		0		0
Unvested Shares, weighted average grant price (in dollars per share)	$ 0		$ 0		$ 0
Restricted Stock Units (RSUs) [Member]
Unvested shares, number (in shares)			0	0	0
Unvested shares, weighted average grant price (in dollars per share)			$ 0	$ 0	$ 0
Granted, number (in shares)		177,564		177,564	177,564
Granted, weighted average grant price (in dollars per share)					$ 2.14
Vested, number (in shares)		(177,564)		(177,564)	(177,564)
Vested, weighted average grant price (in dollars per share)					$ 2.14
Unvested Shares, number (in shares)	0		0		0
Unvested Shares, weighted average grant price (in dollars per share)	$ 0		$ 0		$ 0
Unvested Shares, number (in shares)	0		0		0
Unvested Shares, weighted average grant price (in dollars per share)	$ 0		$ 0		$ 0

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

+ Details

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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