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Intangible Assets and Goodwill
 9 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill Intangible Assets and Goodwill
Intangible Assets
The details of definite lived intangible assets were as follows (in thousands):
Estimated useful life
(in years) 		As of
 September 30, 2022December 31, 2021
Patents
3 - 5
$6,288 $5,986 
Development programs
2 - 4
7,200 7,200 
Developed technology52,736 3,038 
16,224 16,224 
Accumulated amortization (11,548)(9,526)
$4,676 $6,698 

Amortization related to intangible assets was as follows (in thousands):
Three Months Ended September 30,Nine Months Ended
September 30,
 2022202120222021
Amortization expense$660 $1,026 $2,147 $3,068 

Estimated amortization expense for future years is as follows (in thousands):
Remainder of 2022$737 
20232,209 
2024900 
2025511 
2026319 
$4,676 
Goodwill
The carrying amount of goodwill by segment was as follows (in thousands):
Laser ProductsAdvanced DevelopmentTotals
Balance, December 31, 20212,172 10,248 12,420 
Currency exchange rate adjustment(107)— (107)
Balance, September 30, 2022$2,065 $10,248 $12,313