Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Reconciliation of Federal Statutory Income Tax Rate and Effective Income Tax Rate

The reconciliations of the U.S. statutory federal income tax rates to the Company's effective tax rates were as follows:

	Year Ended December 31,
	2021			2020
U.S. federal statutory income tax rate		21.0	%		21.0	%
Adjustments for the tax effects of:
State income taxes, net of federal tax		1.0			0.6
Other permanent differences		(0.4	)		(0.3	)
Research and development tax credits		3.1			3.8
Research and development credit permanent adjustment		(0.6	)		(1.3	)
Stock-based compensation		(1.6	)		(0.3	)
Uncertain tax positions		(0.8	)		(1.0	)
Change in valuation allowance		(21.7	)		(22.5	)
Effective income tax rate		—	%		—	%

Schedule Of Components Of Deferred Tax Assets And Liabilities

Deferred income taxes reflect the net tax 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 significant components of our deferred tax assets and liabilities are as follows (in thousands):

	As of December 31,
	2021			2020
Deferred tax assets
Net operating loss carryforwards	$	12,623		$	4,549
Research and development credits		2,349			790
Deferred revenue		126			515
Stock-based compensation		5,192			—
Other		533			226
Total deferred tax assets		20,823			6,080
Less: deferred tax liabilities		(280	)		(3	)
Less: valuation allowance		(20,543	)		(6,077	)
Net deferred tax assets	$	—		$	—

Summary of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits for uncertain tax positions were as follows (in thousands):

	Year Ended December 31,
	2021		2020
Unrecognized tax benefits, beginning of year	$	263	$	84
Additions based on tax positions relating to current year		495		242
Additions based on tax positions relating to prior year		—		—
Reductions for positions of prior years		—		(63	)
Unrecognized tax benefits, end of year	$	758	$	263

The Company does not believe it is reasonably possible that its unrecognized tax benefits will change materially in the next twelve months.