Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets

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Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
There were no changes in the carrying amount of goodwill for the years ended December 31, 2021 and 2020.

The changes in intangible assets for the years ended December 31, 2021 and 2020 were as follows (in thousands):
Balance as of December 31, 2019 $ 2,426 
Additions 900
Amortization (1,741)
Balance as of December 31, 2020 $ 1,585 
Amortization (1,547)
Balance as of December 31, 2021 $ 38 

As a result of the asset acquisition accounting treatment of the Aevi Merger, the Company recognized an assembled workforce intangible asset of $0.9 million during the first quarter of 2020, which was assigned a two-year useful life and will be fully amortized in 2022.
The following is a summary of intangible assets held by the Company at December 31, 2021 and 2020, respectively (in thousands):
December 31, 2021
     Gross Carrying Amount      Accumulated Amortization      Net Carrying Amount Weighted-Average Remaining Life
(in years)
Acquired Product Marketing Rights $ 5,056  $ (5,056) $ —  0.0
Acquired Assembled Workforce 900  (862) 38  0.1
Total $ 5,956  $ (5,918) $ 38  0.1
December 31, 2020
     Gross Carrying Amount      Accumulated Amortization      Net Carrying Amount Weighted-Average Remaining Life
(in years)
Acquired Product Marketing Rights $ 5,056  $ (3,950) $ 1,106  0.9
Acquired Assembled Workforce 1,050  (571) 479  1.1
Total $ 6,106  $ (4,521) $ 1,585  0.9