Property and Equipment, Net - Additional Information (Detail) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Depreciation expense	$ 149,000	$ 236,000
Property and equipment, gross	6,469,000		$ 7,950,000
Gain on sale of property and equipment	328,000
Proceeds from sale of property and equipment	787,000
Assets held for sale		$ 0
Property and equipment classified as assets held for sale, fair value	254,000
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 197,000		$ 267,000

Fair value portion of assets classified as held for sale.

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