Commitments and Contingencies - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Beginning balance			$ 15
Restructuring expenses	$ 60	$ 11	60	$ 98	$ 100	$ 500
Payments made			(15)
Ending balance	60		60		15
Severance [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance			0
Restructuring expenses			60
Payments made			0
Ending balance	60		60		0
Lease Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance			15
Restructuring expenses			0
Payments made			(15)
Ending balance	$ 0		$ 0		$ 15