Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Taxes [Abstract]

(Loss) Income from Continuing Operations Before Income Taxes

Loss before income taxes consisted of the following components:

	Year Ended December 31,
	2021		2020
United States	$	(21,714,000)	$	(21,583,000)
Foreign		(1,441,000)		(598,000)
Total	$	(23,155,000)	$	(22,181,000)

Reconciliation of Statutory to Effective Tax Rates

The differences between the Company’s effective tax rate and the U.S. federal statutory tax rate were as follows:

	December 31,
	2021		2020
U.S. federal statutory income tax rate	21.0	%	21.0	%
Adjustments for tax effects of:
State income taxes, net of federal tax	6.2	%	6.6	%
Stock-based compensation	(0.8)	%	(0.7)	%
Change in valuation allowance	(27.2)	%	(28.5)	%
Other	0.8	%	1.6	%
Effective income tax rate	0.0	%	0.0	%

Components of Deferred Tax Assets

Significant components of the Company’s deferred tax assets and liabilities were as follows:

	December 31,
	2021		2020
Deferred tax assets:
Net operating loss carryforwards	$	36,405,000	$	31,243,000
Capitalized research and development		16,306,000		15,789,000
Stock-based compensation		2,467,000		2,087,000
Depreciation and amortization		1,301,000		1,405,000
Lease accounting		10,631,000		3,478,000
Other		1,174,000		989,000
Total deferred tax assets before valuation allowance		68,284,000		54,991,000
Less: valuation allowance		(58,251,000)		(51,972,000)
Total deferred tax assets after valuation allowance		10,033,000		3,019,000
Deferred tax liabilities:
Right-of-use asset		(10,033,000)		(3,019,000)
In-process research and development		(3,077,000)		(3,077,000)
Total deferred tax liabilities		(13,110,000)		(6,096,000)
Net deferred tax liability	$	(3,077,000)	$	(3,077,000)