Note 10 - Stockholders' Equity, Stock Options and Warrants (Details Textual)			2 Months Ended	3 Months Ended		6 Months Ended
	Apr. 19, 2023 shares	Mar. 16, 2023 $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	May 03, 2024 USD ($) $ / shares	Dec. 31, 2023 $ / shares shares
Preferred Stock, Shares Authorized			20,000,000	20,000,000		20,000,000			20,000,000
Common Stock, Shares Authorized	200,000,000		200,000,000	200,000,000		200,000,000			200,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.01	$ 0.01		$ 0.01		$ 0.01	$ 0.01
Proceeds from Issuance of Common Stock | $						$ 3,695,848	$ 0
Share-Based Payment Arrangement, Expense | $				$ 307	$ 5,872	1,040	$ 15,159
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $			$ 182	$ 182		$ 182
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Month)						10 months
Sales Agreement [Member]
Sale of Stock, Maximum Amount | $								$ 3,696,000
Sale of Stock, Commissions, Percent								3.00%
Stock Issued During Period, Shares, New Issues (in shares)			1,607,100
Shares Issued, Price Per Share (in dollars per share) | $ / shares			$ 2.3	$ 2.3		$ 2.3
Proceeds from Issuance of Common Stock | $			$ 3,696,000
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
Preferred Stock, Shares Issued		79,404
Preferred Stock, Voting Rights Per Share		1,000,000
Preferred Stock, Shares Outstanding (in shares)	0
Series F Preferred Stock [Member] | O 2023 Q1 Dividends [Member]
Dividends Payable, Date of Record		Mar. 27, 2023