Note 7 - Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Inventory	$ 28,657	$ 24,576
Naphtha [Member]
Inventory	12,680	8,782
Jet Fuel [Member]
Inventory	9,409	8,570
HOBM [Member]
Inventory	4,316	5,144
Crude Oil and Condensate [Member]
Inventory	1,889	1,494
Chemicals [Member]
Inventory	196	160
AGO [Member]
Inventory	125	392
Propane [Member]
Inventory	29	24
LPG Mix [Member]
Inventory	$ 13	$ 10