Note 10 - Stockholders' Equity, Stock Options and Warrants (Details Textual)			3 Months Ended
	Apr. 19, 2023 shares	Mar. 16, 2023 $ / shares shares	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($)	Dec. 31, 2023 shares
Common Stock, Shares Authorized	200,000,000		200,000,000		200,000,000
Share-Based Payment Arrangement, Expense | $			$ 734	$ 9,287
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $			$ 779
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			3 years
Maximum [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			10 years
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	20
Reverse Stock Split [Member] | Minimum [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Reverse Stock Split [Member] | Maximum [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	25
Series F Preferred Stock [Member]
Preferred Stock, Shares Authorized		80,000
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.01
Preferred Stock Dividends, Shares Per Share		0.001
Dividends Payable, Date of Record		Mar. 27, 2023
Preferred Stock, Shares Issued		79,404
Preferred Stock, Voting Rights Per Share		1,000,000
Preferred Stock, Shares Outstanding (in shares)	0