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Intangible Assets and Goodwill (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Sep. 30, 2023
Components of intangible assets        
Intangible assets, gross $ 331,908 $ 349,421    
Accumulated amortization (303,139) (298,541)    
Finite-lived intangible assets 21,369      
In-process research and development 7,400      
Intangible assets, net 28,769 50,880    
Acquisition of intangible assets $ 0 3,000 $ 0  
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 11,200    
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 286,712 299,925    
Accumulated amortization (265,756) (261,708)    
Finite-lived intangible assets $ 20,956 38,217    
Acquisition of intangible assets   $ 3,000    
Identified intangible assets assumed, useful life (in years)   5 years    
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    
Customer contracts and contractual relationships        
Components of intangible assets        
Gross carrying amount $ 37,496 $ 37,996    
Accumulated amortization (37,083) (36,533)    
Finite-lived intangible assets $ 413 $ 1,463    
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