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Intangible Assets, Net and Goodwill
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net and Goodwill Intangible Assets, Net and Goodwill
The following table presents details of purchased intangible assets as of December 31, 2020 and 2019:
December 31, 2020
Gross Carrying AmountAccumulated AmortizationNet Carrying AmountRemaining Weighted Average Useful Life
(in thousands)(in years)
Intangible assets subject to amortization:
Acquired license$11,886 $(1,367)$10,519 9.8
Non-compete agreements and other covenant rights
5,100 (1,064)4,036 4.9
Total intangible assets subject to amortization
16,986 (2,431)14,555 
Intangible assets not subject to amortization:
IPR&D1,600 — 1,600 
Goodwill3,290 — 3,290 
Total purchased intangible assets
$21,876 $(2,431)$19,445 
December 31, 2019
Gross Carrying AmountAccumulated AmortizationNet Carrying AmountRemaining Weighted Average Useful Life
(in thousands)(in years)
Intangible assets subject to amortization:
Acquired license$5,100 $(373)$4,727 9.5
Non-compete agreements2,500 (303)2,197 5.5
Total intangible assets subject to amortization
7,600 (676)6,924 
Intangible assets not subject to amortization:
IPR&D1,600 — 1,600 
Goodwill3,290 — 3,290 
Total purchased intangible assets
$12,490 $(676)$11,814 
Amortization of finite-lived intangible assets was $1.8 million and $0.7 million for the year ended December 31, 2020 and 2019, respectively. There were no intangible assets as of December 31, 2018.
The following table summarizes estimated future amortization expense of finite-lived intangible assets—net:
Year Ending December 31,
(in thousands)
2021$1,947 
20221,947 
20231,947 
20241,953 
20251,705 
2026 and thereafter5,056 
Total$14,555