Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Components of Tax Benefit (Provision) Allocated to Continuing Operations

Components of tax benefit (provision) allocated to continuing operations include the following:

	Year Ended			Year Ended
	December 31,			December 31,
	2020			2019
Current:
Federal	$	16		$	(4	)
State		(9	)		10
Foreign		(8	)		(27	)
Sub-total	$	(1	)	$	(21	)
Deferred:
Federal	$	—		$	—
State		—			—
Foreign		—			—
Sub-total	$	—		$	—
Total tax benefit (provision)	$	(1	)	$	(21	)

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

The reconciliation of the statutory federal income tax rate to the Company’s effective income tax rate is as follows:

	Year Ended						Year Ended
	December 31,						December 31,
	2020			%			2019			%
Income taxes computed at statutory rates	$	6,832			(21	)%	$	6,892			(21	)%
(Increases) decreases resulting from:
State income taxes, net of federal tax benefit		451			(1	)%		143			(1	)%
Federal and state research and experimentation credits		947			(3	)%		781			(2	)%
Change in valuation allowance		(7,830	)		24	%		(7,873	)		24	%
Impact of expired tax positions		—			—	%		—			—	%
Impact of recent U.S. tax reform		—			—	%		—			—	%
Other		(401	)		1	%		36			—	%
Total	$	(1	)		—	%	$	(21	)		—	%

Components of Deferred Tax Assets and Deferred Tax Liabilities

The tax effects of significant items comprising the Company’s deferred tax assets and deferred tax liabilities are as follows:

	Year Ended			Year Ended
	December 31,			December 31,
	2020			2019
Deferred tax assets:
Stock based compensation	$	158		$	1,166
Federal and state net operating losses		47,442			39,879
Goodwill		154			220
Accrued compensation		14			9
ASC 842 - lease liabilities		524			712
Federal and state research and experimentation credit		9,152			8,173
Intangible asset differences		87			122
Deferred social security tax		212			—
Other		27			57
Total gross deferred tax assets		57,770			50,338
Less valuation allowance		(55,639	)		(47,809	)
Net deferred tax assets	$	2,131		$	2,529
Deferred tax liabilities:
Patent expenditures	$	(1,433	)	$	(1,481	)
ASC 842 - right of use assets		(386	)		(528	)
Fixed asset differences		(312	)		(520	)
Total gross deferred tax liabilities	$	(2,131	)	$	(2,529	)
Total net deferred tax assets	$	—		$	—

Summary of Reconciliation of Uncertain Tax Positions

A summary reconciliation of the Company’s uncertain tax positions is as follows:

	Year Ended		Year Ended
	December 31,		December 31,
	2020		2019
Beginning balance	$	676	$	613
Addition for current year tax positions		92		61
Addition for prior year tax positions		55		2
Reduction for prior year positions		—		—
Reduction for prior year positions resolved during the current year		—		—
Ending balance	$	823	$	676