Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Income Tax Benefit

The income tax benefit consisted of the following (dollars in thousands):

	Years Ended December 31,
	2021			2020
Current:
U.S.	$	(4,188	)	$	(3,148	)
Non-U.S		1,100			—
Total Current	$	(3,088	)	$	(3,148	)

Schedule of Effective Income Tax Rate Reconciliation

Reconciliations of the differences between the benefit for income taxes and income taxes at the statutory U.S. federal income tax rate is as follows (dollars in thousands):

	2021						2020
	Amount			Percent of Pretax Income			Amount			Percent of Pretax Income
Income taxes from continuing operations at statutory rate	$	(7,781	)		21.0	%	$	(12,250	)		21.0	%
State income taxes		(1,144	)		3.1	%		(4,108	)		7.0	%
State effect of permanent items		(906	)		2.4	%		78			(0.1	)%
Foreign withholding taxes		1,100			(3.0	)%		—			—
Stock-based compensation		114			(0.3	)%		96			(0.2	)%
Deferred rate change		339			(0.9	)%		—			—
Warrants issuance		(6,622	)		17.9	%		131			(0.2	)%
Other		(489	)		1.3	%		206
NOL sale		214			(0.6	)%		301			(0.5	)%
R&D credit adjustment		—			—			2			—
Increase in valuation allowance		12,087			(32.6	)%		12,396			(21.3	)%
Total income tax benefit	$	(3,088	)		8.3	%	$	(3,148	)		5.7	%

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets and liabilities as of December 31, 2021 and 2020 are as follows (in thousands):

	December 31,
	2021			2020
Noncurrent deferred tax assets (liabilities)
Accrued expenses	$	1,264		$	148
Stock-based compensation		2,554			2,591
Lease liability		789			935
Other		(757	)		(823	)
Net operating loss carryforwards		80,453			70,936
Research and development credits		6,839			5,291
Total deferred tax assets		91,142			79,078
Valuation allowances		(91,142	)		(79,078	)
Net deferred tax assets	$	—		$	—

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a tabular reconciliation of the total amounts of unrecognized tax benefits as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021		2020
Unrecognized tax benefit—January 1	$	436	$	436
Additions for tax positions of current period		—		—
Additions for tax positions of prior periods		—		—
Deferred rate change		—		—
Unrecognized tax benefit—December 31	$	436	$	436