Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities and Fair Value Measurements - Additional Information (Detail)

v3.21.2
Marketable Securities and Fair Value Measurements - Additional Information (Detail) - USD ($)
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Investments Debt And Equity Securities [Abstract]    
Proceeds from sale of available-for-sale securities $ 0 $ 0
Available-for-sale securities, realized gain $ 0 $ 0