Restructuring and Severance - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses	$ (140,000)	$ 388,000
Net credit representing difference between amounts accrued and the settlement amount	153,000,000
3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		388,000
Severance
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses	$ 13,000,000
Severance | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		59,000
Facility Rental | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		329,000
Impairment of ROU Operating Lease Asset | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		$ 281,000