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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes [Abstract]

Schedule Of Effective Income Tax Rate Reconciliation

					Year ended December 31,
					2022			2021		2020
Tax at federal statutory rate					21.0	%		21.0	%		21.0	%
State tax, net of federal benefit					—			—			—
Share-based compensation					(0.5)			1.2			(42.8)
Research and development credits					4.9			2.3			1.6
Section 162(m) limitation					(0.2)			(0.5)			—
Other					(1.8)			(0.2)			—
Change in valuation allowance					(23.4)			(23.8)			20.2
Effective income tax rate					—	%		—	%		—	%

Schedule Of Deferred Tax Assets And Valuation Allowance

	December 31,
	2022			2021
Deferred tax assets:
Net operating loss carryforwards	$	28,017		$	24,777
Share-based compensation		2,706			2,870
Research and development credit carryforwards		9,681			7,439
Capitalized research and development expenses		12,690			—
Other		934			1,130
Total deferred tax assets		54,028			36,216
Valuation allowance		(54,002)			(36,166)
Net deferred tax assets		26			50
Deferred tax liabilities:
Operating lease right-of-use assets		(26)			(50)
Total deferred tax liabilities		(26)			(50)
Net deferred tax asset (liability)	$	—		$	—

Schedule Of Unrecognized Tax Benefits

	Year ended December 31,
	2022			2021				2020
Beginning balance	$	5,001		$	4,500		$	4,400
Additions based on tax positions related to the current year		1,495			501			100
Ending balance	$	6,496		$	5,001		$	4,500

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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.

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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.

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Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.

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