Note 5 - Concentration of Risk (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

						Portion of
						Accounts
	Number		% Total			Receivable at
	Significant		Revenue from			March 31,
Three Months Ended	Customers		Operations			(in millions)
March 31, 2024		3		81.3	%	$	11.7
March 31, 2023		3		65.7	%	$	11.6

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31,
	2024				2023
	(in thousands, except percent amounts)
LPG mix	$	61	0.1	%	$	55	0.0	%
Naphtha		18,113	20.1	%		20,729	20.7	%
Jet fuel		27,394	30.5	%		35,345	35.9	%
HOBM		20,535	22.8	%		33,488	18.3	%
AGO		23,812	26.5	%		25,023	25.1	%
	$	89,915	100.0	%	$	114,640	100.0	%