Note 13 - Convertible Preferred Stock (Details Textual) - USD ($)			12 Months Ended
	Apr. 12, 2023	Apr. 12, 2023	Dec. 31, 2024	Dec. 31, 2023
Proceeds from Issuance of Common Stock			$ 6,482,000	$ 5,992,000
Preferred Stock, Shares Outstanding (in shares)			0
Conversion of Series E Preferred Stock and Accrued Dividends to Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)	674,693
Series E Preferred Stock [Member]
Preferred Stock, Convertible, Gross Proceeds Threshold	$ 4	$ 4
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 6	$ 6
Preferred Stock, Shares Outstanding (in shares)			0
Securities Purchase Agreements [Member]
Proceeds from Issuance of Common Stock	$ 6,000,000	$ 6,000,000