Financial Instruments and Risk - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| Schedule Of Equity Method Investments [Line Items] | |
| Average days to maturity of Company's portfolio of cash equivalents and marketable securities | 0 days |
| Maximum [Member] | |
| Schedule Of Equity Method Investments [Line Items] | |
| Maturity period of securities | 1 year |