Note 3 - Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details) - shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Antidilutive securities (in shares)	11,695,127	8,729,082
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	119,281	131,833
Restricted Stock [Member]
Antidilutive securities (in shares)	0	33,333
Warrant [Member]
Antidilutive securities (in shares)	9,447,966	5,327,636
Anson Note [Member]
Antidilutive securities (in shares)	2,127,880	3,236,280