Restructuring (Tables)

12 Months Ended

Dec. 31, 2021

Restructuring and Related Activities [Abstract]

Summary of Restructuring Activity

The following table summarizes the restructuring activity during the year ended December 31, 2021 and 2020 (in thousands):

	Accrued Restructuring Costs
Balance at December 31, 2019	$	—
Restructuring costs incurred		2,919
Termination benefits paid		(1,496	)
Balance at March 31, 2020	$	1,423
Restructuring costs incurred		554
Termination benefits paid		(920	)
Balance at June 30, 2020	$	1,057
Restructuring costs incurred		—
Termination benefits paid		(863	)
Balance at September 30, 2020	$	194
Restructuring costs incurred		—
Termination benefits paid		(186	)
Balance at December 31, 2020	$	8
Restructuring costs incurred		—
Termination benefits paid		(8	)
Balance at March 31, 2021	$	—

Summary of Restructuring Expense

The following table summarizes the classification of restructuring expense in the consolidated statements of operations and comprehensive income (loss) for the years ended December 31, 2021 and 2020:

	Year Ended December 31,
	2021		2020
Research and development	$	—	$	2,723
General and administrative		—		750
Total restructuring expense	$	—	$	3,473