Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

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

A reconciliation of the statutory federal income tax rate and the effective income tax rate for the years ended December 31, 2021 and 2020 was as follows:

	Years Ended December 31,
	2021			2020
Statutory federal income tax rate		21.0	%		21.0	%
Permanent items		(7.0	%)		(2.8	%)
State income taxes, net of federal taxes		(0.2	%)		(0.1	%)
Foreign		(0.8	%)		(0.3	%)
Change in valuation allowance		46.6	%		(19.1	%)
Forgiveness of PPP loans		26.7	%		0.0	%
Stock options		(83.8	%)		(5.4	%)
Lease accounting		(0.1	%)		(0.1	%)
Other		(2.4	%)		6.8	%
Effective income tax rate		0.0	%		0.0	%

Summary of Significant Components of Deferred Tax Assets and Liabilities

Significant components of deferred tax assets and liabilities are as follows (in thousands):

	December 31,			December 31,
	2021			2020
Net operating loss carryforwards	$	19,603		$	19,152
Stock-based compensation		1,153			1,936
Research and development tax credit		2,899			2,899
Other		235			397
Non-current deferred tax assets		23,890			24,384
Valuation allowance		(23,890	)		(24,384	)
Net deferred tax assets	$	—		$	—