Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Oct. 16, 2019	Oct. 31, 2019	Dec. 31, 2023	Sep. 30, 2022	Dec. 20, 2018
Deferred Tax Assets, Net, Total				$ 0	$ 4,600
Series A Cumulative Convertible Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage	8.00%	8.00%	8.00%