Intangible Assets and Goodwill (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2023
Components of intangible assets
Intangible assets, gross	$ 325,797	$ 331,908
Accumulated amortization	(308,738)	(303,139)
Intangible assets, net	$ 17,059	28,769
Divestiture, not discontinued operations | PHY IP Group
Components of intangible assets
Disposal of intangible assets, noncurrent			$ 7,400
Minimum
Components of intangible assets
Useful life (in years)	6 months
Maximum
Components of intangible assets
Useful life (in years)	10 years
In-process research and development
Components of intangible assets
In-process research and development		7,400
In-process research and development | Divestiture, not discontinued operations | PHY IP Group
Components of intangible assets
Disposal of intangible assets, noncurrent			$ 3,800
Existing technology
Components of intangible assets
Gross carrying amount	$ 288,001	286,712
Accumulated amortization	(270,954)	(265,756)
Finite-lived intangible assets	$ 17,047	$ 20,956
Existing technology | Minimum
Components of intangible assets
Useful life (in years)	3 years	3 years
Existing technology | Maximum
Components of intangible assets
Useful life (in years)	10 years	10 years
Existing technology | PLDA Group
Components of intangible assets
Useful life (in years)	5 years
Finite-lived intangible assets, period increase (decrease)	$ 7,400
Customer contracts and contractual relationships
Components of intangible assets
Gross carrying amount	37,496	$ 37,496
Accumulated amortization	(37,484)	(37,083)
Finite-lived intangible assets	$ 12	$ 413
Customer contracts and contractual relationships | Minimum
Components of intangible assets
Useful life (in years)	6 months	6 months
Customer contracts and contractual relationships | Maximum
Components of intangible assets
Useful life (in years)	10 years	10 years
Non-compete agreements and trademarks
Components of intangible assets
Gross carrying amount	$ 300	$ 300
Accumulated amortization	(300)	(300)
Finite-lived intangible assets	$ 0	$ 0
Useful life (in years)	3 years	3 years