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Organization and Summary of Significant Accounting Policies - Summary of Financial Instruments at Fair Value on a Recurring Basis (Detail) - Fair Value, Recurring [Member]
Dec. 31, 2020
USD ($)
Assets:  
Assets
Liabilities:  
Hybrid debt instrument at fair value 0
Fair Value, Inputs, Level 1 [Member]  
Assets:  
Assets
Liabilities:  
Hybrid debt instrument at fair value
Fair Value, Inputs, Level 2 [Member]  
Assets:  
Assets
Liabilities:  
Hybrid debt instrument at fair value
Fair Value, Inputs, Level 3 [Member]  
Assets:  
Assets
Liabilities:  
Hybrid debt instrument at fair value $ 0