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Reduction in workforce (Tables)
12 Months Ended
Dec. 31, 2021
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
The following table summarizes the accrued liabilities activity recorded in connection with the reduction in workforce for the year ended December 31, 2021 (in thousands):
ChargesAmount paidAmounts accrued
at December 31,
2021
April 2021 reduction$4,625 $(4,625)$— 
July 2021 reduction21,176 (16,503)4,673 
Total$25,801 $(21,128)$4,673