Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the U.S. statutory income tax rate to the Company’s effective tax rate is as follows (in thousands):

	December 31,
	2021			2020			2019
U.S. statutory tax benefit	$	(3,699	)	$	(2,688	)	$	(4,586	)
Partnership income (federal) not subject to tax to the Company		996			904			1,868
Foreign withholding tax		91			—			79
State taxes (net of federal benefit)		(14	)		(13	)		134
Research and development tax credit		(173	)		(138	)		(231	)
Other		10			75			(81	)
Change in valuation allowance		2,904			1,860			2,917
Provision for income taxes	$	115		$	—		$	100
Effective income tax rate		-0.7	%		0.0	%		-0.5	%

Schedule of Net Deferred Tax Assets/(Liabilities)

Significant components of our net deferred tax assets/(liabilities) are as follows (in thousands):

	December 31,
	2021			2020
Deferred tax assets:
Net operating loss carryforwards	$	20,909		$	17,338
R&D Tax Credit carryforwards		1,755			1,587
Investment in partnerships		(2,353	)		(1,520	)
Charitable contributions		11			12
Total deferred tax assets		20,322			17,417
Valuation allowance		(20,322	)		(17,417	)
Net deferred tax assets	$	—		$	—