Note 5 - Capital Stock - Summary of Common Stock Outstanding (Details) - shares	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
Less Treasury Shares: (in shares)	(189)	(189)	(189)
Common stock, outstanding (in shares)	3,207,210	3,207,210	1,144,737
Prefunded Warrants [Member]
Issuances related to Common Warrant exercises (in shares)	1,283,131
Common Stock [Member]
Issued Shares (in shares)		1,144,926	573,644
Issuances from Preferred Stock conversions (in shares)		257,617	282,335
Issued Shares (in shares)	3,207,399	3,207,399	1,144,926
Less Treasury Shares: (in shares)	(189)	(189)
Common stock, outstanding (in shares)	3,207,210	3,207,210
Common Stock [Member] | Common Warrants [Member]
Issuances related to Common Warrant exercises (in shares)		521,725	288,947
Common Stock [Member] | Prefunded Warrants [Member]
Issuances related to Common Warrant exercises (in shares)		1,283,131