Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Tax

The provision for income tax consists of the following:

	Year Ended December 31,
	2021		2020		2019
Federal	$	11	$	12	$	9
State		10		10		9
Foreign		—		11		16
Total income tax (benefit) expense	$	21	$	33	$	34

Schedule of Reconciliation of Actual Income Tax Expense Obtained by Applying Statutory Federal Income Tax Rate

Actual income tax expense differs from that obtained by applying the statutory federal income tax rate of 21% in 2021, 2020, and 2019, respectively, to income before income taxes as follows: (in thousands):

	Year Ended December 31,
	2021			2020			2019
Tax at federal statutory rate	$	(13,124	)	$	(18,882	)	$	(22,424	)
State, net of federal benefit		(770	)		(2,372	)		(2,109	)
PPP loan forgiveness		(1,397	)		—			—
Permanent items		606			2,282			857
Benefit state rate change		(184	)		20			337
Other		8,499			2,984			368
Goodwill impairment		—			—			1,602
Change in valuation allowance		6,391			16,001			21,403
	$	21		$	33		$	34

Schedule of Tax Effects of Temporary Differences and Carryforwards that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities

The tax effects of temporary differences and carryforwards that give rise to significant portions of the deferred tax assets and liabilities are as follows (in thousands):

	December 31,
	2021			2020
Net operating loss carryforwards	$	122,570		$	113,374
Research and development credits		2,121			2,121
Lease liabilities		1,798			1,861
Derivative liability		—			6,495
Accruals and reserves		14,961			10,175
Intangibles		1,732			3,053
		143,182			137,079
Less valuation allowance		(137,700	)		(131,309	)
Total deferred tax assets	$	5,482		$	5,770
Depreciation	$	(717	)	$	(276	)
Convertible debt discount		(2,800	)		(3,440	)
Right-of-use assets		(1,624	)		(1,793	)
Intangibles - deferred tax liability		(434	)		(333	)
Total deferred tax liabilities		(5,575	)		(5,842	)
Net deferred taxes	$	(93	)	$	(72	)

Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

Ending balance at December 31, 2019	$	1,116
Additions based on tax positions taken in the current year		10
Decreases based on tax positions taken in a prior year		(507	)
Ending balance at December 31, 2020		619
Additions based on tax positions taken in the current year		—
Ending balance at December 31, 2021	$	619