Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of provision for income taxes rate

	Year Ended December 31,
	2021			2020
Federal tax benefit at statutory rate	$	(6,433	)	$	(6,651	)
State taxes		(1,729	)		(1,757	)
Change in fair value of derivative		735			2,284
Change in fair value of warrant liability		(105	)		—
Change in fair value of earnout liability		(1,948	)		—
Non-deductible expenses		633			231
Research and development credits		(1,095	)		(298	)
Change in valuation allowance		10,095			6,191
Other		(153	)		—
Provision for income taxes	$	—		$	—

Schedule of company’s net deferred tax assets (liabilities)

	December 31,
	2021			2020
Deferred tax assets:
Accrued expenses and other	$	510		$	592
Intangibles		407			369
Net operating losses		14,683			6,046
Research and development credits		1,410			315
Stock based compensation		222			179
Lease Liability		760			485
Unrealized gain/loss		13			—
Total deferred tax assets		18,005			7,986
Valuation allowance		(17,682	)		(7,587	)
Total net deferred tax assets		323			399
Deferred tax liabilities:
Right-of-use asset		(302	)		(399	)
Fixed assets		(21	)		—
Total deferred tax liabilities		(323	)		(399	)
Net deferred tax assets	$	—		$	—

Schedule of company’s federal and state net operating loss carryforwards

	Amount		Expiration Years
Net operating losses, Federal	$	53,071	Do not expire
Net operating losses, states primarily California	$	45,442	2038 – 2041

Schedule of reconciliation of unrecognized tax benefits

	Year Ended December 31,
	2021		2020
Balance at beginning of year	$	252	$	17
Additions based on tax positions related to current year		576		235
Balance at end of year	$	828	$	252