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Acquired Intangible Assets (Acquired Intangible Assets) (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) $ 20,362 $ 20,362
Accumulated amortization (17,240) (16,986)
Net carrying amount 3,122 3,376
Indefinite-lived Intangible Assets Acquired 2,057 2,057
Intellectual Property [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 16,841 16,841
Accumulated amortization (15,776) (15,522)
Net carrying amount $ 1,065 $ 1,319
Intellectual Property [Member] | Minimum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 7 years 7 years
Intellectual Property [Member] | Maximum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 15 years 15 years
Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 882 $ 882
Accumulated amortization (882) (882)
Net carrying amount $ 0 $ 0
Trademarks [Member] | Minimum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 4 years 4 years
Trademarks [Member] | Maximum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 4 years 6 months 4 years 6 months
Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 582 $ 582
Accumulated amortization (582) (582)
Net carrying amount $ 0 $ 0
Other [Member] | Minimum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 2 years 2 years
Other [Member] | Maximum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 7 years 7 years