Note 4 - Revenue and Segment Information - Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2025		Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024
Revenues from operations		$ 70,355		$ 82,109	$ 210,630		$ 242,790
Crude oil, fuel use, and chemicals		62,279		80,069	187,524		221,558
Other conversion costs		7,226		4,313	14,088		14,911
Tolling and terminaling costs		174		400	436		1,220
Depreciation and amortization		644		644	1,927		1,930
Total costs of goods sold		70,323		85,426	203,975		239,619
LEH operating fee, related party		279		202	737		628
General and administrative expenses		1,633		1,041	3,692		3,495
Other operating expenses	[1]	117		177	361		457
Depreciation and amortization		74		61	222		184
Impairment of fixed assets		3,026		0	3,026		0
Interest, net		849		1,548	3,865		4,354
Total costs and expenses		76,301		88,455	215,878		248,737
Income (loss) before income taxes		(5,946)		(6,346)	(5,248)		(5,947)
Income tax benefit (expense)		1,270		1,346	1,094		1,221
Net income (loss)		(4,676)		(5,000)	(4,154)		(4,726)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues from operations				0	0		0
Crude oil, fuel use, and chemicals				0	0		0
Other conversion costs				0	0		0
Tolling and terminaling costs				0	0		0
Depreciation and amortization				0	0		0
Total costs of goods sold		0		0	0		0
LEH operating fee, related party				0			0
General and administrative expenses		1,034		667	2,014		2,401
Other operating expenses	[1]	117		177	361		457
Depreciation and amortization		74		61	222		184
Impairment of fixed assets		3,026			3,026
Interest, net		163		136	494		408
Total costs and expenses		4,414		1,041	6,117		3,450
Income (loss) before income taxes		(4,414)		(1,041)	(6,117)		(3,450)
Income tax benefit (expense)		1,270		1,346	1,094		1,221
Net income (loss)		(3,144)		305	(5,023)		(2,229)
Consolidation, Eliminations [Member]
Revenues from operations		(772)	[2]	(930)	(1,912)	[2]	(2,006)
Crude oil, fuel use, and chemicals			[2]	0	0	[2]	0
Other conversion costs		(772)	[2]	(930)	(1,912)	[2]	(2,006)
Tolling and terminaling costs			[2]	0	0	[2]	0
Depreciation and amortization			[2]	0	0	[2]	0
Total costs of goods sold		(772)	[2]	(930)	(1,912)	[2]	(2,006)
LEH operating fee, related party			[2]	0	0	[2]	0
General and administrative expenses			[2]	0	0	[2]	0
Other operating expenses	[1]		[2]	0	0	[2]	0
Depreciation and amortization			[2]	0	0	[2]	0
Interest, net			[2]	0	0	[2]	0
Total costs and expenses		(772)	[2]	(930)	(1,912)	[2]	(2,006)
Income (loss) before income taxes		0	[2]	0	0	[2]	0
Income tax benefit (expense)		0	[2]	0	0		0
Net income (loss)		0	[2]	0	0	[2]	0
Refinery Operations [Member]
Revenues from operations		69,590		81,280	208,253		239,743
Refinery Operations [Member] | Operating Segments [Member]
Revenues from operations		69,590		81,280	208,253		239,743
Crude oil, fuel use, and chemicals		62,279		80,069	187,524		221,558
Other conversion costs		7,998		5,243	16,000		16,917
Tolling and terminaling costs				0			0
Depreciation and amortization		302		302	901		904
Total costs of goods sold		70,579		85,614	204,425		239,379
LEH operating fee, related party		279		202	737		628
General and administrative expenses		529		305	1,448		933
Other operating expenses	[1]			0			0
Depreciation and amortization				0			0
Interest, net		249		900	2,013		2,440
Total costs and expenses		71,636		87,021	208,623		243,380
Income (loss) before income taxes		(2,046)		(5,741)	(370)		(3,637)
Income tax benefit (expense)		0		0	0		0
Net income (loss)		(2,046)		(5,741)	(370)		(3,637)
Tolling and Terminaling [Member]
Revenues from operations		765		829	2,377		3,047
Tolling and Terminaling [Member] | Operating Segments [Member]
Revenues from operations		1,537		1,759	4,289		5,053
Crude oil, fuel use, and chemicals				0	0		0
Other conversion costs				0	0		0
Tolling and terminaling costs		174		400	436		1,220
Depreciation and amortization		342		342	1,026		1,026
Total costs of goods sold		516		742	1,462		2,246
LEH operating fee, related party				0			0
General and administrative expenses		70		69	230		161
Other operating expenses	[1]			0			0
Depreciation and amortization				0			0
Interest, net		437		512	1,358		1,506
Total costs and expenses		1,023		1,323	3,050		3,913
Income (loss) before income taxes		514		436	1,239		1,140
Income tax benefit (expense)		0		0	0		0
Net income (loss)		$ 514		$ 436	$ 1,239		$ 1,140

[1] Includes costs and expenses associated with our pipeline and facilities assets.

[2] Fees associated with an intercompany tolling agreement related to naphtha volumes.