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Operating Lease - Summary of Information Related to Lease (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Assets:    
Operating lease right-of-use assets $ 557 $ 119
Liabilities:    
Operating lease liabilities, current portion 131 125
Operating lease liabilities, net of current portion 474  
Total operating lease liabilities $ 605 $ 125