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Investments - 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
Schedule Of Investments [Line Items]          
Interest on available for sale investment $ 100,000 $ 100,000 $ 200,000 $ 200,000  
Interest on held to maturity investments 1,000,000 500,000 2,200,000 900,000  
Amortization on investments 400,000 $ 200,000 400,000 $ 500,000  
Allowance for credit losses 0   0    
Accrued interest receivable         $ 600,000
Amount receivable on matured investment         5,100,000
Prepaid Expenses and Other Current Assets          
Schedule Of Investments [Line Items]          
Investment securities 200,000   200,000    
Amount receivable on matured investment 200,000   200,000    
Convertible Promissory Note | Thirona Bio, Inc.          
Schedule Of Investments [Line Items]          
Investment securities 8,400,000   8,400,000   $ 7,100,000
Gain on available for sale investment 900,000   900,000    
Unrealized holding gain $ 400,000   $ 400,000