Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes [Abstract]

(Loss) Income from Continuing Operations Before Income Taxes

Loss before income taxes consisted of the following components:

	Year Ended December 31,
	2022		2021
United States	$	(32,228,000)	$	(21,714,000)
Foreign		(4,689,000)		(1,441,000)
Total	$	(36,917,000)	$	(23,155,000)

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,
	2022		2021
U.S. federal statutory income tax rate	21.0	%	21.0	%
Adjustments for tax effects of:
State income taxes, net of federal tax	7.3	%	6.2	%
Stock-based compensation	(0.2)	%	(0.8)	%
Change in valuation allowance	(28.6)	%	(27.2)	%
Other	0.5	%	0.8	%
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,
	2022		2021
Deferred tax assets:
Net operating loss carryforwards	$	42,525,000	$	36,405,000
Capitalized research and development		19,103,000		16,306,000
Stock-based compensation		3,192,000		2,467,000
Depreciation and amortization		929,000		1,301,000
Lease accounting		13,660,000		10,631,000
Other		1,452,000		1,174,000
Total deferred tax assets before valuation allowance		80,861,000		68,284,000
Less: valuation allowance		(68,818,000)		(58,251,000)
Total deferred tax assets after valuation allowance		12,043,000		10,033,000
Deferred tax liabilities:
Right-of-use asset		(12,043,000)		(10,033,000)
In-process research and development		(3,077,000)		(3,077,000)
Total deferred tax liabilities		(15,120,000)		(13,110,000)
Net deferred tax liability	$	(3,077,000)	$	(3,077,000)