Annual report pursuant to Section 13 and 15(d)

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- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
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Income Taxes (Tables)

v3.19.3.a.u2

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Summary of components of the income tax provision

The components of the income tax provision for the years ended December 31, 2019, 2018 and 2017 are as follows:

	Year Ended December 31,
	2019		2018		2017
Current	$	28	$	24	$	7
Deferred		—		—		—
Total	$	28	$	24	$	7

Schedule of reconciliation of effective tax rate expense (benefit) for continuing operations and the statutory federal income tax rate

A reconciliation of the U.S. statutory income tax rate to the Company’s effective tax rate is as follows for the years ended December 31, 2019, 2018 and 2017:

	Year ended
	December 31,
	2019				2018				2017
Federal income tax computed at federal statutory tax rate		21.00		%		21.00		%		34.00		%
State income tax, net of federal benefit		6.56				6.01				5.35
Permanent items		(0.89	)			(0.61	)			(1.57	)
Federal and state research and development credits		4.79				4.79				7.36
Rate change		—				—				(31.79	)
Other		(0.77	)			0.01				0.66
Change in valuation allowance		(30.73	)			(31.24	)			(14.02	)
Effective income tax rate		(0.04	)	%		(0.04	)	%		(0.01	)	%

Schedule of components of deferred tax assets and liabilities

The principal components of the Company’s deferred tax assets and liabilities consist of the following at December 31, 2019 and 2018 (in thousands):

	Year ended
	December 31,
	2019			2018
Deferred tax assets:
Federal and state net operating loss carryforwards	$	68,026		$	51,346
Tax credit carryforwards		14,170			10,558
Intangible assets		46			51
Stock-based compensation		3,774			2,108
Leasehold incentive		—			155
Deferred revenue		2,289			—
Capital lease		7,526			—
Other		1,432			2,809
Total deferred tax assets		97,263			67,027
Less valuation allowance		(90,198	)		(67,027	)
Net deferred tax assets		7,065			—
Deferred tax liabilities:
Right-of-use asset		4,557			—
Fixed assets		2,508			—
Total deferred tax liabilities		7,065			—
Net deferred taxes	$	—		$	—

- References

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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