Note 7 - Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	January 2024
Conversion price before	$	0.79
Conversion price after	$	0.38
Term (years)		0.94
Volatility		122.7	%
Dividend rate		0	%
Risk free rate		4.38	%

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	2024		2023
Common stock equivalents of convertible promissory note and accrued interest		16,906,190		2,946,525
Warrants		1,238,869		1,253,387
Stock options		6,097		6,400
Total		18,151,156		4,206,312

Schedule of Warrant Activity [Table Text Block]

	Number of Shares		Weighted-Average Exercise Price Per Share		Weighted- Average Remaining Contract Term
Balance at December 31, 2023		1,238,869	$	3.14		4.57
Warrants granted		-
Pre-funded warrants granted		-
Warrants exercised		-
Exercisable and Outstanding at March 31, 2024		1,238,869	$	3.14		4.32

Warrants [Member]

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	March 2023
Conversion price before	$	6.30
Conversion price after	$	2.65
Term (years)		4.9
Volatility		123	%
Dividend rate		0	%
Risk free rate		4.20	%