Note 5 - Discontinued Operations - Financial Information (Details) - USD ($) $ in Thousands			2 Months Ended	12 Months Ended
		Dec. 15, 2020	Feb. 02, 2021	Dec. 31, 2021	Dec. 31, 2020
Loss on disposal/classification as held for sale(1)				$ 0	$ 39,096
Net income (loss) from discontinued operations				75,772	(42,175)
Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net					13,959
Plant, property, and equipment					76,837
Other assets				2	6,149
Total assets of discontinued operations				2	96,945
Current liabilities				240	17,248
Total liabilities of discontinued operations				240	17,248
Operating expense				5,169	34,374
General and administrative expense				173	669
Asset impairment expense				155	6,417
Gain on sale of assets				(75,196)	(1,190)
Interest expense				707	5,319
Loss on disposal/classification as held for sale(1)	[1]				39,096
Income (loss) before income taxes				75,769	(42,174)
Provision for income taxes				(3)	1
Net income (loss) from discontinued operations				75,772	(42,175)
Income (loss) before income taxes				75,769	(42,174)
Depreciation and amortization				58	9,652
Capital expenditures				136	7,349
Discontinued Operations, Held-for-sale [Member] | Intersegment Eliminations [Member]
Operating expense				409	5,587
Discontinued Operations, Held-for-sale [Member] | Service [Member] | Intersegment Eliminations [Member]
Revenue				409	5,587
Discontinued Operations, Held-for-sale [Member] | Third Party [Member]
Cost of product sales				4,994	52,624
Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Service [Member]
Revenue				5,641	23,838
Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Product [Member]
Revenue				15,591	157,544
Discontinued Operations, Held-for-sale [Member] | Related Party [Member]
Cost of product sales				9,461	86,247
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net					81
Plant, property, and equipment					442
Other assets				0	331
Total assets of discontinued operations				0	854
Current liabilities				12	1,017
Total liabilities of discontinued operations				12	1,017
Operating expense				1,416	12,386
General and administrative expense				61	284
Asset impairment expense				92	1,330
Gain on sale of assets				23	(11)
Interest expense				0	11
Loss on disposal/classification as held for sale(1)		$ 1,100	$ 700		1,847	[1]
Income (loss) before income taxes				(1,174)	(4,967)
Provision for income taxes				(3)	3
Net income (loss) from discontinued operations				(1,171)	(4,970)
Income (loss) before income taxes				(1,174)	(4,967)
Depreciation and amortization				3	719
Capital expenditures				0	2,074
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Intersegment Eliminations [Member]
Operating expense				0	0
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Service [Member] | Intersegment Eliminations [Member]
Revenue				409	5,587
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member]
Cost of product sales				0	0
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Service [Member]
Revenue				9	5,293
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Product [Member]
Revenue				0	0
Crude Oil Trucking Services [Member] | Discontinued Operations, Held-for-sale [Member] | Related Party [Member]
Cost of product sales				0	0
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net					13,711
Plant, property, and equipment					23,541
Other assets				1	547
Total assets of discontinued operations				1	37,799
Current liabilities				218	14,921
Total liabilities of discontinued operations				218	14,921
Operating expense				1,564	13,427
General and administrative expense				112	385
Asset impairment expense				40	2,821
Gain on sale of assets				(1,720)	(445)
Interest expense				72	960
Loss on disposal/classification as held for sale(1)	[1]				37,249
Income (loss) before income taxes				1,194	(39,622)
Provision for income taxes				0	(2)
Net income (loss) from discontinued operations				1,194	(39,620)
Income (loss) before income taxes				1,194	(39,622)
Depreciation and amortization				14	4,550
Capital expenditures				30	4,555
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Intersegment Eliminations [Member]
Operating expense				409	5,587
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Service [Member] | Intersegment Eliminations [Member]
Revenue				0	0
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member]
Cost of product sales				4,994	52,624
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Service [Member]
Revenue				535	1,689
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Product [Member]
Revenue				15,591	157,544
Crude Oil Pipeline Services [Member] | Discontinued Operations, Held-for-sale [Member] | Related Party [Member]
Cost of product sales				9,461	86,247
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net					167
Plant, property, and equipment					52,854
Other assets				1	5,271
Total assets of discontinued operations				1	58,292
Current liabilities				10	1,310
Total liabilities of discontinued operations				10	1,310
Operating expense				2,189	8,561
General and administrative expense				0	0
Asset impairment expense				23	2,266
Gain on sale of assets				(73,499)	(734)
Interest expense				635	4,348
Loss on disposal/classification as held for sale(1)	[1]				0
Income (loss) before income taxes				75,749	2,415
Provision for income taxes				0	0
Net income (loss) from discontinued operations				75,749	2,415
Income (loss) before income taxes				75,749	2,415
Depreciation and amortization				41	4,383
Capital expenditures				106	720
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Intersegment Eliminations [Member]
Operating expense				0	0
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Service [Member] | Intersegment Eliminations [Member]
Revenue				0	0
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member]
Cost of product sales				0	0
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Service [Member]
Revenue				5,097	16,856
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Third Party [Member] | Product [Member]
Revenue				0	0
Crude Oil Terminalling Services [Member] | Discontinued Operations, Held-for-sale [Member] | Related Party [Member]
Cost of product sales				$ 0	$ 0

[1] Included in the crude oil trucking services segment is a loss on disposal recorded during December 2020 for the first phase closing of $1.1 million, and a loss on the classification on assets held for sale as of December 31, 2020, for the second phase closing on February 2, 2021, of $0.7 million.