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Property and Equipment, Net - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Property Plant And Equipment [Line Items]          
Depreciation expense $ 67,000 $ 128,000 $ 138,000 $ 277,000  
Property and equipment, gross 3,357,000   3,357,000   $ 3,515,000
Gain on sale of property and equipment 7,000 58,000 26,000 386,000  
Proceeds from sale of property and equipment 7,000 $ 54,000 37,000 $ 841,000  
Property and equipment classified as assets held for sale, fair value 87,000   87,000   87,000
Construction in Progress [Member]          
Property Plant And Equipment [Line Items]          
Property and equipment, gross $ 0   $ 0   $ 10,000