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Restructuring Charges (Tables)
 9 Months Ended
Sep. 30, 2021
Restructuring and Related Activities [Abstract]  
Summary of Restructuring Charges
The following table summarizes our restructuring costs during the nine months ended September 30, 2021 as it relates to the April 2020 reduction in our workforce (in thousands):
Beginning balance January 1, 2021AccrualsPaymentsEnding balance September 30, 2021Cumulative
Charges
Incurred		Expected
Additional
Expenses
to be
Incurred
Termination benefits$4,257 $643 $4,311 $589 $28,596 $— 
Total$4,257 $643 $4,311 $589 $28,596 $—