Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets
Allowance for doubtful accounts	$ 0	$ 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	$ 401,086	$ 408,396
Net deferred tax assets	1,271	9,099
Deferred tax liabilities
Right-of-use assets	1,271	1,830
Foreign intangible asset	0	9,116
Total deferred tax liabilities	1,271	10,946
Net deferred tax liabilities included in continuing operations	$ 0	$ (1,847)