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Intangible Assets, Net
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
Intangible assets consisted of the following as of September 30, 2025 (in thousands):

Gross Carrying AmountAccumulated AmortizationIntangible Assets, Net
Amortizing intangible assets
Patents$178,005 $(45,490)$132,515 
Developed technology50,781 (38,377)12,404 
Customer relationships1,250 (937)313 
Assembled workforce669 (536)133 
$230,705 $(85,340)$145,365 

Amortization expense of intangible assets was $5.6 million and $16.8 million for the three and nine months ended September 30, 2025, respectively.
Intangible assets consisted of the following as of December 31, 2024 (in thousands):

Gross Carrying AmountAccumulated AmortizationIntangible Assets, Net
Amortizing intangible assets
Patents$178,005 $(36,590)$141,415 
Developed technology50,781 (30,779)20,002 
Customer relationships1,250 (750)500 
Assembled workforce670 (444)226 
$230,706 $(68,563)$162,143 

Amortization expense of intangible assets was $5.6 million and $17.2 million for the three and nine months ended September 30, 2024, respectively.

The expected future amortization expense for intangible assets as of September 30, 2025 is as follows (in thousands):
September 30, 2025
Remaining 2025$5,585 
202622,124 
202711,867 
202811,867 
202911,867 
Thereafter82,055 
Total expected future amortization expense$145,365