XML 35 R28.htm IDEA: XBRL DOCUMENT v3.21.1

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Taxes

Schedule of reconciliation of U.S. statutory income tax rate to effective tax rate

		Year Ended December 31,
		2020		2019
Federal income tax (benefit) at statutory rate		21.00	%	21.00	%
Permanent differences		(0.41)		(0.57)
Federal research and development credits and adjustments		2.78		2.42
State income tax, net of federal benefit		6.03		5.50
Other		0.37		0.49
Change in valuation allowance		(29.77)		(28.85)
Effective income tax rate		—	%	—	%

Schedule of components of deferred tax assets

The Company's deferred tax assets consisted of the following (in thousands):

		Year Ended December 31,
		2020			2019
Deferred tax assets
Net operating loss carryforwards		$	65,373		$	55,283
Tax credit carryforwards			9,273			8,030
Capitalized research and development			482			922
Capitalized legal expenses			1,070			1,073
Lease liability			284			639
Other differences			1,648			1,453
Total deferred tax assets			78,130			67,400
Deferred tax liabilities
ROU asset			(262)			(639)
Valuation allowance			(77,868)			(66,761)
Net deferred tax assets		$	—		$	—

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

Name:	us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

+ Details

Name:	us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration