Income Taxes. (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of provision for income taxes

	Years Ended December 31,
	2020			2019
Current provision (benefit)	$	—		$	(22	)
Deferred provision (benefit)		(17	)		2
Total	$	(17	)	$	(20	)

Schedule of reconciliation of effective tax rate

	Years Ended December 31,
	2020			2019
Statutory rate		21.0	%		21.0	%
State income taxes, net of federal benefit		5.7			5.7
Change in valuation allowance		(9.4	)		(22.4	)
Fair value adjustments		(12.7	)		—
Noncontrolling interest		(3.4	)		(3.3	)
Non-deductible items		(0.4	)		(0.1	)
Other		(0.8	)		(1.0	)
Effective rate		(0.0	)%		(0.1	)%

Schedule of components of deferred income taxes

	December 31,
	2020			2019
Deferred tax assets:
Net operating loss carryforwards	$	61,208		$	61,775
Capital loss		29,684			—
Disallowed interest		6,255			8,242
R&D, Energy and AMT credits		3,864			3,864
Pension liability		3,235			2,979
Railcar contracts		302			379
Stock-based compensation		441			551
Allowance for doubtful accounts and other assets		461			578
Property and equipment		—			3,325
Other		1,963			3,458
Total deferred tax assets		107,413			85,151
Deferred tax liabilities:
Property and equipment		(16,243	)		—
Intangibles		(749	)		(749	)
Derivatives		(4,497	)		(153	)
Other		(472	)		(437	)
Total deferred tax liabilities		(21,961	)		(1,339	)
Valuation allowance		(85,688	)		(84,065	)
Net deferred tax liabilities, included in other liabilities	$	(236	)	$	(253	)

Schedule of net operating loss carryforwards

Tax Years	Federal		State
2021–2025	$	4,103	$	—
2026–2030		9,678		56,174
2031–2035		106,886		57,567
2036 and after*		107,150		97,940
Total NOLs	$	227,817	$	211,681

Year	Federal		State
2021	$	152,026	$	135,458
2022		6,308		5,318
2023		6,308		5,318
2024		6,308		5,135
2025		6,308		5,089
Beyond 2025		50,559		55,363
Total	$	227,817	$	211,681

Schedule of income tax in the United States jurisdiction and various state jurisdictions

Jurisdiction	Tax Years
Federal	2017 – 2019
Alabama	2017 – 2019
Arizona	2016 – 2019
Arkansas	2017 – 2019
California	2016 – 2019
Colorado	2015 – 2019
Connecticut	2017 – 2019
Georgia	2017 – 2019
Idaho	2017 – 2019
Illinois	2017 – 2019
Indiana	2017 – 2019
Iowa	2017 – 2019
Kansas	2017 – 2019
Louisiana	2017 – 2019
Michigan	2017 – 2019
Minnesota	2017 – 2019
Mississippi	2017 – 2019
Missouri	2017 – 2019
Nebraska	2017 – 2019
New Mexico	2017 – 2019
Oklahoma	2017 – 2019
Oregon	2017 – 2019
Pennsylvania	2017 – 2019
Rhode Island	2017 – 2019
South Carolina	2017 – 2019
Tennessee	2017 – 2019
Texas	2016 – 2019