Note 11 - AROs - ARO Liability (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
AROs, at the beginning of the period	$ 4,504	$ 3,710	$ 3,710
Changes in estimates of existing obligations	0		1,558
Liabilities settled	(1,505)		(823)
Accretion of asset retirement obligations	0	$ 35	59
Less: AROs, current portion	(2,999)		(4,504)
Long-term AROs, at the end of the period	$ 0		$ 0