Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Summary of Components of Loss Before Income Taxes

The components of loss from continuing operations before income taxes are presented below:

	Year Ended December 31,
	2024		2023		2022
Domestic	$	(85,879)	$	(93,522)	$	(76,572)
Foreign	(42,149)		(2,840)		(3,394)
Loss from continuing operations before income taxes	$	(128,028)	$	(96,362)	$	(79,966)

Summary of Components of Income Tax Benefit

The components of income tax benefit from continuing operations are presented below:

	Year Ended December 31,
	2024		2023		2022
United States federal income taxes:
Deferred	$	(41)	$	(247)	$	37
Foreign income taxes:
Current	—		—		(39)
Deferred	(1,743)		(152)		(198)
State income taxes:
Current	2		21		—
Deferred	(11)		(80)		11
Income tax benefit from continuing operations	$	(1,793)	$	(458)	$	(189)

Summary of Effective Income Tax Rate Reconciliation

Income tax benefit from continuing operations for the years ended December 31, 2024, 2023, and 2022 differed from amounts computed by applying the applicable United States federal corporate income tax rate of 21% to loss before income taxes as a result of the following:

	2024		2023		2022
Computed statutory income tax benefit from continuing operations	$	(26,886)	$	(20,236)	$	(16,793)
State and provincial income tax benefit, net of federal income taxes	(4,092)		(6,693)		(2,884)
Nondeductible stock based compensation	313		3,417		179
Nondeductible officer compensation	309		278		263
Impairment of goodwill	551		—		101
Nondeductible equity investment loss	—		—		3,093
Research and development tax incentives	(1,750)		(1,383)		(991)
United States-foreign rate differential	(1,081)		(15)		18
Other, net	60		1,109		533
	(32,576)		(23,523)		(16,481)
Change in valuation allowance for deferred tax assets	30,783		23,065		16,292
Total income tax benefit from continuing operations	$	(1,793)	$	(458)	$	(189)

Summary of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that comprise the deferred tax assets and liabilities included in continuing operations as of December 31, 2024, and 2023, are as follows:

	2024		2023
Deferred tax assets
Allowance for doubtful accounts	$	—	$	48
Equity securities and investments in affiliates	472		413
Property, plant and equipment	237		369
Intangible assets	56,113		64,013
Accrued liabilities	2,478		3,262
Lease liabilities	1,383		1,834
Stock-based compensation	14,205		14,465
Deferred revenue	503		478
Capitalized research and development cost	29,796		23,918
Research and development tax credits	16,232		13,577
Net operating, capital loss, and interest expense carryforwards	283,926		311,154
Total deferred tax assets	405,345		433,531
Less: (Valuation allowance)	404,074		424,432
Net deferred tax assets	1,271		9,099
Deferred tax liabilities
Right-of-use assets	1,271		1,830
Foreign intangible asset	—		9,116
Total deferred tax liabilities	1,271		10,946
Net deferred tax liabilities included in continuing operations	$	—	$	(1,847)

Summary of Valuation Allowance

Activity within the valuation allowance for deferred tax assets included in continuing operations during the years ended December 31, 2024, 2023, and 2022 was as follows:

	2024		2023		2022
Valuation allowance at beginning of year	$	424,432	$	401,086	$	408,396
Increase (decrease) in valuation allowance as a result of
Current year continuing operations	30,783		23,065		16,292
Discontinued operations treated as asset sales	—		—		(27,909)
Expired attributes	(50,269)		—		—
Adoption of ASU 2020-06	—		—		4,698
Foreign currency translation adjustment	(872)		281		(391)
Valuation allowance at end of year	$	404,074	$	424,432	$	401,086