Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments, Measured at Fair Value, Hedging Activities, and Concentrations of Credit Risk - Composition of Short-term Investments (Detail)

v3.20.2
Financial Instruments, Measured at Fair Value, Hedging Activities, and Concentrations of Credit Risk - Composition of Short-term Investments (Detail)
$ in Thousands
Sep. 30, 2020
USD ($)
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Total short-term investments $ 20,802
Corporate Debt Securities [Member]  
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Total short-term investments 17,803
Commercial Paper [Member]  
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Total short-term investments $ 2,999