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Revenue (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Summary of revenue by category
The following table summarizes revenue by category:
Year Ended December 31, 2021Year Ended December 31, 2020
Revenue by category:
Licensing agreements$1,809 $860 
Summary of revenue by geography
The following table summarizes revenue by geography:
Year Ended December 31, 2021Year Ended December 31, 2020
Revenue by geography:
United States$— $— 
Latin America1,809 860 
$1,809 $860 
Summary of deferred revenue and other income
The following table summarizes the deferred revenue relating to Eurofarma Laboratórios S.A. and deferred other income relating to BARDA (as defined in Note 8), respectively:

2021
Beginning deferred revenue and other income, January 1 (1)
$8,939 
Additions5,438
Amount of deferred revenue and other income recognized in the statement of operations(6,438)
Ending deferred revenue and other income, December 31 (2)
$7,939 
__________
(1) Beginning deferred revenue and other income included $8,370 of current deferred revenue and other income and $569 of long-term deferred revenue and other income.
(2) Ending deferred revenue and other income is classified within current liabilities.