Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Taxes [Abstract]

(Loss) Income from Continuing Operations Before Income Taxes

Loss before income taxes consisted of the following components:

	Year Ended December 31,
	2020		2019
United States	$	(21,583,000)	$	(18,341,000)
Foreign		(598,000)		(1,138,000)
Total	$	(22,181,000)	$	(19,479,000)

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,
	2020		2019
U.S. federal statutory income tax rate	21.0	%	21.0	%
Adjustments for tax effects of:
State income taxes, net of federal tax	6.6	%	2.6	%
Stock-based compensation	(0.7)	%	(0.5)	%
Change in valuation allowance	(28.5)	%	(22.7)	%
Net operating loss carryforwards and credit expirations	0	%	(3.1)	%
Stock issuance costs	0	%	(1.2)	%
Gain on derivative liability extinguishment	0	%	1.2	%
Slovenia facility sale	0	%	1.9	%
Permanent differences	0	%	1.3	%
Other	1.6	%	(0.5)	%
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,
	2020		2019
Deferred tax assets:
Net operating loss carryforwards	$	31,243,000	$	26,291,000
Capitalized research and development		15,789,000		15,262,000
Stock-based compensation		2,087,000		1,358,000
Depreciation and amortization		1,405,000		1,632,000
Lease accounting		3,478,000		801,000
Other		989,000		981,000
Total deferred tax assets before valuation allowance		54,991,000		46,325,000
Less: valuation allowance		(51,972,000)		(45,670,000)
Total deferred tax assets after valuation allowance		3,019,000		655,000
Deferred tax liabilities:
Right-of-use asset		(3,019,000)		(655,000)
In-process research and development		(3,077,000)		(3,077,000)
Total deferred tax liabilities		(6,096,000)		(3,732,000)
Net deferred tax liability	$	(3,077,000)	$	(3,077,000)