Cash and Cash Equivalents - Schedule of Percentage of Bank Held Cash and Cash Equivalents Split by Currency (Detail) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| CHF [Member] | ||
| Disclosure of cash and cash equivalents [Line Items] | ||
| Percentage of bank held cash and cash equivalents | 1.00% | 2.00% |
| USD [Member] | ||
| Disclosure of cash and cash equivalents [Line Items] | ||
| Percentage of bank held cash and cash equivalents | 96.00% | 87.00% |
| EUR [Member] | ||
| Disclosure of cash and cash equivalents [Line Items] | ||
| Percentage of bank held cash and cash equivalents | 1.00% | 11.00% |
| GBP [Member] | ||
| Disclosure of cash and cash equivalents [Line Items] | ||
| Percentage of bank held cash and cash equivalents | 1.00% | 0.00% |