The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands			12 Months Ended
	Aug. 12, 2022	May 17, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Net
Gross value			$ 12,483	$ 4,876
Accumulated amortization			(2,738)	(1,559)
Net			9,745	3,317
Amortization of intangible assets			1,177	789	$ 559
Finite-Lived Intangible Assets, Net, Amortization Expense
2023			1,792
2024			1,658
2025			1,555
2026			1,306
2027			908
Goodwill			6,428	0
Customer Relationships
Finite-Lived Intangible Assets, Net
Gross value			9,948	4,876
Accumulated amortization			(2,656)	(1,559)
Net			7,292	3,317
Trade names
Finite-Lived Intangible Assets, Net
Gross value			2,218	0
Accumulated amortization			(57)	0
Net			2,161	0
Noncompete agreements
Finite-Lived Intangible Assets, Net
Gross value			317	0
Accumulated amortization			(25)	0
Net			292	0
Firebird and Phoenix
Finite-Lived Intangible Assets, Net, Amortization Expense
Goodwill	$ 6,428		6,400
Firebird and Phoenix \| Customer Relationships
Finite-Lived Intangible Assets, Net
Useful life	10 years
Firebird and Phoenix \| Trade names
Finite-Lived Intangible Assets, Net
Useful life	15 years
Firebird and Phoenix \| Noncompete agreements
Finite-Lived Intangible Assets, Net
Useful life	5 years
EH Trucking \| Customer Relationships
Finite-Lived Intangible Assets, Net
Gross value			1,703	1,703
Accumulated amortization			(1,010)	(765)
Net			$ 693	938
Useful life			3 years 6 months
Comcar \| Customer Relationships
Finite-Lived Intangible Assets, Net
Gross value			$ 3,173	3,173
Accumulated amortization			(1,286)	(794)
Net			$ 1,887	2,379
Useful life		7 years	4 years 6 months
Phoenix \| Customer Relationships
Finite-Lived Intangible Assets, Net
Gross value			$ 5,072	0
Accumulated amortization			(360)	0
Net			$ 4,712	$ 0
Firebird and Phoenix \| Customer Relationships
Finite-Lived Intangible Assets, Net
Useful life			9 years 6 months
Firebird and Phoenix \| Trade names
Finite-Lived Intangible Assets, Net
Useful life			14 years 6 months
Firebird and Phoenix \| Noncompete agreements
Finite-Lived Intangible Assets, Net
Useful life			4 years 6 months