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Goodwill and Acquired Intangible Assets (Acquired Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) $ 20,362 $ 22,099
Accumulated amortization (16,986) (17,688)
Net carrying amount 3,376 4,411
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 (15,522) (15,184)
Net carrying amount $ 1,319 $ 1,657
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 $ 1,213
Accumulated amortization (882) (1,185)
Net carrying amount $ 0 $ 28
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 $ 1,988
Accumulated amortization (582) (1,319)
Net carrying amount $ 0 $ 669
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