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Leases - Schedule of Balance Sheet Operating Leases (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Assets:    
Operating lease right-of-use asset $ 82 $ 131
Liabilities:    
Operating lease liabilities, current portion 92 120
Operating lease liabilities, long term portion 3 24
Total operating lease liabilities $ 95 $ 144