Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Total revenue	$ 68,860	$ 52,389	$ 214,199	$ 160,066
Operating expenses
Payroll, benefits and related	25,689	25,404	69,394	78,135
Purchased transportation	17,303	7,546	38,024	23,023
Fuel	7,278	5,023	19,131	16,948
Equipment rent	3,736	2,086	9,275	7,743
Maintenance and supplies	2,642	2,263	7,357	7,753
General and administrative	6,335	4,858	17,121	14,086
Operating supplies and expenses	3,748	3,705	11,308	11,722
Depreciation and amortization	4,009	3,816	11,371	10,931
Insurance and claims	1,918	2,077	6,881	7,617
Loss on sale of fixed assets	41		78
Change in fair value of contingent consideration				296
Total operating expenses	72,723	56,873	190,158	178,640
Operating income (loss)	(3,863)	(4,484)	24,041	(18,574)
Other income (expense)
Interest expense	(2,784)	(3,083)	(9,686)	(10,148)
Change in fair value of embedded derivative liability	1,311	815	1,407	661
Change in fair value of warrant liabilities	481	(1,726)	2,243	5,534
Gain (loss) on extinguishment of debt	10,163	46	10,953	(10,010)
Other miscellaneous income	10	34	14	34
Total other expense	9,181	(3,914)	4,931	(13,929)
Income (loss) before income taxes	5,318	(8,398)	28,972	(32,503)
(Provision) benefit for income taxes	11	(37)	(1,574)	(142)
Net income (loss)	$ 5,329	$ (8,435)	$ 27,398	$ (32,645)
Earnings per share:
Basic	$ 0.17	$ (0.42)	$ 0.89	$ (1.68)
Diluted	$ 0.16	$ (0.42)	$ 0.83	$ (1.68)
Weighted average shares outstanding:
Basic	30,891,398	20,270,915	30,377,872	19,906,638
Diluted	33,536,838	20,270,915	33,358,162	19,906,638
Trucking [Member]
Revenue
Total revenue	$ 68,769	$ 52,133	$ 179,160	$ 159,258
Other [Member]
Revenue
Total revenue			34,758
CNG [Member]
Revenue
Total revenue	91	256	281	808
Operating expenses
CNG expenses	$ 24	$ 95	$ 218	$ 386