Note 5 - Concentration of Risk (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

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

						Portion of
						Accounts
	Number		% Total			Receivable at
	Significant		Revenue from			June 30,
Three Months Ended	Customers		Operations			(in millions)
June 30, 2024		2		68.9	%	$	5.9
June 30, 2023		3		83.7	%	$	1.5

						Portion of
						Accounts
	Number		% Total			Receivable at
	Significant		Revenue from			June 30,
Six Months Ended	Customers		Operations			(in millions)
June 30, 2024		3		80.5	%	$	5.9
June 30, 2023		3		72.7	%	$	1.5

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30,								Six Months Ended June 30,
	2024				2023				2024				2023
	(in thousands, except percent amounts)								(in thousands, except percent amounts)
LPG mix	$	55	0.1	%	$	57	0.1	%	$	116	0.1	%	$	112	0.1	%
Naphtha		14,669	21.4	%		9,174	13.6	%		32,782	20.7	%		29,903	16.4	%
Jet fuel		26,026	38.0	%		25,419	37.8	%		53,420	33.7	%		60,764	33.4	%
HOBM		6,366	9.3	%		10,197	15.2	%		26,901	17.0	%		43,685	24.0	%
AGO		21,432	31.3	%		22,420	33.3	%		45,244	28.6	%		47,443	26.1	%
	$	68,548	100.0	%	$	67,267	100.0	%	$	158,463	100.0	%	$	181,907	100.0	%