Note 22 - Selected Unaudited Quarterly Financial Data (Details Textual) - Pre-funded Warrant [Member] - shares	Sep. 30, 2025	Sep. 30, 2024	Jul. 26, 2023
Class of Warrant or Right, Outstanding (in shares)	472,665		5,278,776
Revision of Prior Period, Error Correction, Adjustment [Member]
Class of Warrant or Right, Outstanding (in shares)		3,679,400