Restructuring and Severance - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost And Reserve [Line Items]
Net credit representing difference between amounts accrued and the settlement amount			$ 151,000
Restructuring and severance expenses	$ 49,000	$ 99,000	132,000	$ 761,000
3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		99,000		761,000
Severance
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses	$ 49,000		$ 283,000
Facility Rental | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		67,000		523,000
Severance | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses		$ 32,000		238,000
Impairment of ROU Operating Lease Asset | 3VR
Restructuring Cost And Reserve [Line Items]
Restructuring and severance expenses				$ 281,000