Note 6 - Equity-Based Compensation - Summary of Outstanding RSUs (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	131,882		131,880
Granted, fair value (in dollars per share)			$ 1.66
Restricted Stock Units (RSUs) [Member]
Outstanding (in shares)		3,000
Outstanding, weighted average exercise price (in dollars per share)		$ 15.35
Outstanding, weighted average remaining contractual term (Year)		4 months 24 days	2 months 12 days
Outstanding, intrinsic value	$ 0	$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		17,627
Granted, fair value (in dollars per share)		$ 1.66
Vested and issued, shares underlying restricted stock units (in shares)		(5,937)
Vested and issued, fair value (in dollars per share)		$ 8.58
Legacy BioPharmX options, shares underlying options and warrants (in shares)	14,690	14,690	3,000
Outstanding, weighted average exercise price (in dollars per share)	$ 1.66	$ 1.66	$ 15.35

For presentations that combine terminations, 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 or that expired.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Weighted average price of options that were either forfeited or expired.

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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
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-Section 50
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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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