Income Taxes

All of our income is generated in the U.S. The components of income tax provision (benefit) were as follows (in thousands):



	Year Ended December 31,
	2018			2017			2016
Current federal	$	1,222		$	(413	)	$	(378	)
Current state	571			331			32
	1,793			(82		)	(346		)

Deferred federal	(135		)	(5,368		)	285
Deferred state	(371		)	(32		)	75
	(506		)	(5,400		)	360
	$	1,287		$	(5,482	)	$	14

Income tax provision (benefit) differs from the amount computed by applying the statutory federal income tax rate to income (loss) before income taxes as follows (in thousands):



	Year Ended December 31,
	2018			2017			2016
Provision at U.S. statutory rate	$	1,140		$	1,374		$	(104	)
State taxes, net of federal benefit	210			189			49
Effect of tax rate change on deferred tax assets and liabilities	—			(6,923		)	—
Permanent differences, primarily meals and entertainment	111			180			264
Stock-based compensation	(42		)	(11		)	(41		)
Domestic production activities deduction	—			—			(20		)
Tax credits	(132		)	(291		)	(134		)
	$	1,287		$	(5,482	)	$	14

Significant components of our deferred tax assets and liabilities were as follows (in thousands):



	December 31,
	2018			2017
Deferred tax assets
Net operating losses and tax credit carryforwards	$	11		$	982
Accrued salaries and severance	1,089			1,127
Other	1,403			1,497
	2,503			3,606
Deferred tax liabilities
Property, equipment and leasehold improvements	(10,783		)	(12,287		)
Intangible assets	(3,977		)	(4,054		)
Other	(124		)	(151		)
	(14,884		)	(16,492		)
	$	(12,381	)	$	(12,886	)

As of December 31, 2018, included in our net operating losses and tax credit carryforwards were State NOLs, tax effected of $10,000. We also have an AMT credit carryforward of $170,000 which is refundable over the next four years. As such, the carryforward is recognized as a tax receivable on our Consolidated Balance Sheets as of December 31, 2018.

In assessing the realizability of our deferred tax assets, we consider future taxable income expected to be generated by the projected differences between financial statement depreciation and tax depreciation, cumulative earnings generated to date and other evidence available to us. Based upon this consideration, we assessed that all of our deferred taxes are more likely than not to be realized, and, as such, we have not recorded a valuation allowance as of December 31, 2018 or 2017.

There were no unrecognized tax benefits as of December 31, 2018 or 2017 and we do not anticipate significant changes to our unrecognized tax benefits within the next twelve months.