Fair value measurements - Summary of Binomial Lattice Model for the initial measurement of Public Warrants and Private Placement Warrants (Detail) - d |
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Nov. 05, 2019 |
|---|---|---|---|---|---|---|
| Risk-free interest rate [Member] | ||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||||
| Measurement Input | 0.38 | 0.32 | 0.35 | 0.45 | 1.76 | 1.66 |
| Market price of public stock [Member] | ||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||||
| Measurement Input | 10.47 | 10.19 | 10.05 | 9.72 | 9.78 | 9.69 |
| Dividend Yield [Member] | ||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||||
| Measurement Input | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Implied volatility [Member] | ||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||||
| Measurement Input | 21.8 | 22.1 | 17.9 | 14.4 | 13.8 | 10.7 |
| Exercise price [Member] | ||||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||||
| Measurement Input | 11.50 | 11.50 | 11.50 | 11.50 | 11.50 | 11.50 |