Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Additional Information (Detail)

v3.21.1
Financial Instruments - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Financial Instruments Disclosure [Abstract]      
Accrued interest receivable $ 700,000   $ 700,000
Write off, of accrued interest receivable 0 $ 0  
Restricted Cash $ 1,400,000   $ 1,400,000