Note 11 - Stock-Based Compensation - Schedule of Unvested Restricted Stock (Details) - shares	3 Months Ended	6 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance	429,153
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance	433,528	429,376
Restricted shares granted	144,500	10,819
Restricted shares vested	(148,875)	(6,667)
Balance	429,153	433,528