Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Summary of company's net deferred tax assets

For the years ended December 31, 2021 and 2020, the Company recorded current income tax expense of zero and $0.4 million, respectively. Significant components of the Company’s net deferred tax assets are summarized as follows (in thousands):

	December 31, 2021			December 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$	36,898		$	29,829
Intangibles		3,565			3,875
Accrued compensation		1,284			325
Credits		7,107			6,252
Fixed assets		6			40
Other, net		74			96
Right-of-use liability		36			23
Deferred tax assets		48,970			40,440
Deferred tax liabilities:
Right-of-use asset		(35	)		(19	)
Deferred tax liabilities		(35	)		(19	)
Net deferred tax assets		48,935			40,421
Valuation allowance		(48,935	)		(40,421	)
Net deferred tax assets	$	—		$	—

Summary of reconciliation of the income tax computed at the federal statutory tax rate to the expense (benefit) for income taxes

A reconciliation of the income tax computed at the federal statutory tax rate to the expense for income taxes for the years ended December 31, 2021 and 2020 is as follows (in thousands):

	December 31, 2021			December 31, 2020
Tax at statutory rate	$	3,318		$	3,058
State income taxes, net of federal benefits		(1,853	)		292
Change in valuation allowance		8,515			808
Uncertain tax positions		569			474
Gain on change in fair value of earn-out liability		(10,271	)		—
Permanent differences and other		636			47
Capitalized R&D		510			(3,836	)
Credits		(1,424	)		(492	)
Income tax expense	$	—		$	351

Summary of reconciliation of the beginning and ending amount of unrecognized tax benefit

A reconciliation of the beginning and ending amount of unrecognized tax benefits for 2021 and 2020, excluding interest and penalties, is as follows (in thousands):

	December 31, 2021		December 31, 2020
Balance at beginning of the year	$	7,623	$	7,068
Additions/(reductions) for tax positions - prior year		—		—
Increase related to current year positions		612		555
Balance at the end of the year	$	8,235	$	7,623