Note 3 - Related-party Transactions - Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue from operations	$ 144,255	$ 56,583	$ 225,745	$ 140,275
Percentage of revenues from operations	100.00%	100.00%	100.00%	100.00%
Lazarus Energy Holdings (LEH) [Member] \| Refinery Operations [Member]
Revenue from operations	$ 44,221	$ 24,121	$ 78,801	$ 49,069
Percentage of revenues from operations	30.70%	42.60%	34.90%	35.00%
Lazarus Energy Holdings (LEH) [Member] \| Tolling and Terminaling [Member]
Revenue from operations	$ 585	$ 540	$ 1,170	$ 1,080
Percentage of revenues from operations	0.40%	1.00%	0.50%	0.80%
Related Party [Member]
Interest expense, related party		$ 433	$ 843	$ 966
Related Party [Member] \| Jonathan Carroll [Member] \| LE Term Loan Due 2034 [Member]
Interest expense, related party	$ 86	92	173	185
Related Party [Member] \| Jonathan Carroll [Member] \| NPS Term Loan Due 2031 [Member]
Interest expense, related party	40	47	82	93
Related Party [Member] \| Jonathan Carroll [Member] \| LRM Term Loan Due 2034 [Member]
Interest expense, related party	36	38	72	77
Related Party [Member] \| Jonathan Carroll [Member] \| BDEC Term Loan Due 2051 [Member]
Interest expense, related party	10	10	20	20
Related Party [Member] \| Lazarus Energy Holdings (LEH) [Member] \| BDPL-LEH Loan Agreement [Member]
Interest expense, related party	78	153	158	259
Related Party [Member] \| Lazarus Energy Holdings (LEH) [Member] \| Second Amended and Restated Affiliate Revolving Credit Agreement [Member]
Interest expense, related party	133	93	338	332
Related Party [Member] \| Lazarus Energy Holdings (LEH) [Member] \| Affiliate Revolving Credit Agreement [Member]
Interest expense, related party	383
Nonrelated Party [Member] \| Refinery Operations [Member]
Revenue from operations	$ 99,269	$ 31,674	$ 145,414	$ 89,594
Percentage of revenues from operations	68.80%	56.00%	64.40%	63.80%
Nonrelated Party [Member] \| Tolling and Terminaling [Member]
Revenue from operations	$ 180	$ 248	$ 360	$ 532
Percentage of revenues from operations	0.10%	0.40%	0.20%	0.40%