Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income tax expense (benefit) consisted of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Current:
U.S.—Federal	$	(328	)	$	—		$	—
U.S.—State	—			2			23
Deferred:
U.S.—Federal	426			(1,321		)	(7,046		)
U.S.—State	235			—			(889		)
Total	$	333		$	(1,319	)	$	(7,912	)

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense was different from the amounts computed by applying U.S. Federal income tax rate to pretax income as a result of the following:

	Year Ended December 31,
	2018		2017		2016
Federal statutory rate	21.0	%	35.0	%	35.0	%
State income taxes, net of federal benefit	0.6	%	—	%	1.6	%
Expiration of capital loss carryover	—	%	—	%	(17.6	)%
Change in valuation allowance related to current activity	(21.3	)%	(30.1	)%	9.2	%
Change in valuation allowance related to change in tax rate	—	%	(291.2	)%	—	%
Change in tax rate	—	%	291.2	%	—	%
Permanent items	1.3	%	1.1	%	(5.7	)%
Provision to return adjustments and other	(0.8	)%	(7.9	)%	(7.8	)%
Actual income tax rate	0.8	%	(1.9	)%	14.7	%

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets (liabilities) are comprised of the following (in thousands):

	December 31,
	2018			2017
Deferred tax assets:
Net operating loss	$	396,033		$	388,317
Property and equipment	8,323			9,862
Intangible assets	444			—
Other	17,886			10,263
Total deferred tax assets	422,686			408,442
Valuation allowance	(394,196		)	(383,253		)
Net deferred tax assets	28,490			25,189
Deferred tax liabilities:
Investment in Laramie Energy	26,981			18,140
Convertible notes	2,658			3,193
Intangible assets	—			3,978
Other	496			863
Total deferred tax liabilities	30,135			26,174
Total deferred tax liability, net	$	(1,645	)	$	(985	)