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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill is measured as the excess of the cost of the acquisition over the sum of the amounts assigned to tangible and identifiable intangible assets acquired less liabilities assumed. The Company assigns assets acquired (including goodwill) and liabilities assumed to one or more reporting units as of the date of acquisition. Typically acquisitions related to a single reporting unit do not require the allocation of goodwill to multiple reporting units. If the products obtained in an acquisition are assigned to multiple reporting units, the goodwill is distributed to the respective reporting units as part of the purchase price allocation process.

Goodwill and purchased intangible assets are reviewed for impairment annually during the fourth quarter of each fiscal year and whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill and intangible assets requires significant judgment. The Company regularly monitors current business conditions and other factors including, but not limited to, adverse industry or economic trends and lower projections of profitability that may impact future operating results.

As of March 31, 2022 and December 31, 2021, goodwill was $1,953 and $2,009, respectively. Changes in goodwill during the three months ended March 31, 2022 are the result of foreign currency movements. There were no goodwill impairment
charges recognized for the quarter ended March 31, 2022 and there have been no cumulative goodwill impairment charges recognized to date.
Intangible assets, net of accumulated amortization, impairment charges and adjustments are summarized as follows:

March 31, 2022December 31, 2021
Gross carrying amountAccumulated amortization and impairmentNetGross carrying amountAccumulated amortization and impairmentNet
Utrophin program acquired$4,362 $(4,362)$— $4,487 $(4,487)$— 
Discuva platform acquired14,014 (4,148)9,866 14,416 (4,017)10,399 
Option over non-financial asset887 (887)— 912 (912)— 
Other patents and licenses144 (144)— 148 (148)— 
$19,407 $(9,541)$9,866 $19,963 $(9,564)$10,399 

Changes in the gross carrying amount of intangible assets during the three months ended March 31, 2022 was the result of foreign currency movements. For the three months ended March 31, 2022 and 2021, amortization expense was $248 and $255, respectively.