Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2022  | 
Jun. 30, 2021  | 
Jun. 30, 2022  | 
Jun. 30, 2021  | 
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| Property, Plant and Equipment [Abstract] | ||||
| Depreciation expense | $ 296 | $ 306 | $ 580 | $ 587 | 
| Leased assets write off | 24 | 0 | 24 | 82 | 
| Accumulated depreciation | $ 24 | $ 0 | $ 24 | $ 64 | 
| X | ||||||||||
- Definition Accumulated depreciation related to leased assets written off. No definition available. 
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| X | ||||||||||
- Definition Write off of leased assets. No definition available. 
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- References No definition available. 
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