10. INCOME TAXES

The Company recorded a deferred tax liability of $0.1 million as of December 31, 2018, related to the acquisition of IPR&D through the Merger. This deferred tax liability was recorded to account for the book versus tax basis difference related to the IPR&D intangible asset. This deferred tax liability was excluded from sources of future taxable income, as the timing of its reversal cannot be predicted due to the indefinite life of this IPR&D. As such, this deferred tax liability cannot be used to offset the valuation allowance. As a result of the write-off of the IPR&D in 2019, the related deferred tax liability of $0.1 million was eliminated and is included in income tax benefit in the consolidated statements of operations for the year ended December 31, 2019.

Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The Company’s net deferred tax assets relate primarily to its net operating loss carryforwards, allowance for doubtful accounts and stock-based compensation, offset by property and equipment and intangible assets. The Company has recorded a full valuation allowance to offset the net deferred tax assets, as it is more likely than not that the Company will not realize future benefits associated with these net deferred tax assets at December 31, 2020 and 2019.

At December 31, 2020 and 2019, the Company had net deferred tax assets of $13.5 million and $10.7 million, respectively, against which a full valuation allowance has been recorded. The increase in the valuation allowance for the years ended December 31, 2020 and 2019 is $2.8 million and $1.9 million, respectively, resulting from additional net operating losses generated in the year. The deferred tax liabilities associated with the book versus tax basis difference of intangible assets are the result of an asset step-up pursuant to the Merger. Significant components of the Company’s deferred tax assets at December 31, 2020 and 2019 are as follows:


	Dollars in Thousands
	2020		2019
Deferred tax assets:
Net operating loss and credit carryforwards	$	15,941	$	13,989
Allowance for doubtful accounts		986		666
Stock-based compensation		461		292
Other		39		—
Gross deferred tax assets		17,427		14,947
Deferred tax liabilities:
Property and equipment		(94)		(95)
Intangible assets		(3,849)		(4,148)
IPR&D intangible assets		—		—
Gross deferred tax liabilities		(3,943)		(4,243)
Net deferred tax assets		13,484		10,704
Less valuation allowance		(13,484)		(10,704)
Net deferred liability	$	—	$	—

The Company’s provision for income taxes for the years ended December 31, 2020 and December 31, 2019 relates to income taxes in states and other jurisdictions and differs from the amounts determined by applying the statutory federal income tax rate to the loss before income taxes for the following reasons:


	Dollars in Thousands
	2020		2019
Benefit at federal rate	$	(2,231)	$	(2,796)
Increase (decrease) resulting from:
State income taxes—net of federal benefit		(379)		(517)
Miscellaneous permanent differences		48		78
Warrant liability revaluation		(3)		(104)
Meals and entertainment		18		—
Impairment of in-process research and development		—		(70)
Change in valuation allowance		2,547		3,339
Total income tax benefit	$	—	$	(70)

The income tax expense consists of the following for the years ended December 31, 2020 and 2019.


	Dollars in Thousands
	2020		2019
Federal:
Current	$	—	$	—
Deferred		—		(70)
Total Federal	$	—	$	(70)
State:
Current	$	—	$	—
Deferred		—		—
Total State	$	—	$	—
Foreign:
Current	$	—	$	—
Deferred		—		—
Total Foreign	$	—	$	—
Total Tax Provision	$	—	$	(70)

The Company had approximately $68 million and $61 million of available gross federal and state net operating loss (“NOL”) carryforwards as of December 31, 2020 and 2019, respectively. Beginning in 2018, under the Act, federal loss carryforwards have an unlimited carryforward period, however such losses can only offset 80% of taxable income in any one year. Included in the total NOLs for 2020 are $39 million of federal losses that fall under these new rules. Section 382 of the Internal Revenue Code, and similar state regulations, contain provisions that may limit the NOL carryforwards available to be used to offset income in any given year upon the occurrence of certain events, including changes in the ownership interests of significant stockholders. In the event of a cumulative change in ownership in excess of 50% over a three-year period, the amount of the NOL carryforwards that the Company may utilize in any one year may be limited. The Company reduced its tax attributes (NOLs and tax credits) and generated a limitation on utilization of such attributes resulting from the Merger.

At December 31, 2020 and 2019, and as a result of the limitations under Section 382 of the Internal Revenue Code, the Company had a total of unused federal tax net operating loss carryforwards with expiration dates as follows:


	Dollars in Thousands
	2020		2019
2036	$	13,470	$	13,470
2037		13,641		3,441
Unlimited life		39,101		42,100
Total Federal	$	66,212	$	59,011

The Company has adopted guidance on accounting for uncertainty in income taxes which clarified the accounting for income taxes by prescribing the minimum threshold a tax position is required to meet before being recognized in the financial statements as well as guidance on de-recognition, measurement, classification and disclosure of tax positions. There are no material uncertain tax positions that would require recognition in the financial statements. The Company is obligated to file income tax returns in the U.S. federal jurisdiction and various U.S. states. Since the Company had losses in the past, all prior years that generated NOLs are open and subject to audit examination in relation to the NOL generated from those years. Our evaluation of uncertain tax positions was performed for the tax years ended December 31, 2014 and forward.