Revenue - Additional Information (Detail) - Contract |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Disclosure of revenue [line items] | ||
| Number of forward contracts outstanding | 0 | 0 |
| Customer A [member] | ||
| Disclosure of revenue [line items] | ||
| Risk Revenue | 33.00% | 33.00% |
| Customer B [member] | ||
| Disclosure of revenue [line items] | ||
| Risk Revenue | 32.00% | 25.00% |