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FAIR VALUE MEASUREMENTS - Level 3 Fair Value Measurements Inputs (Details) |  | 12 Months Ended |  |
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Nov. 02, 2020 item $ / shares USD ($) | Dec. 31, 2020 item $ / shares USD ($) | Oct. 12, 2020 item USD ($) | Dec. 31, 2019 item $ / shares USD ($)
FAIR VALUE MEASUREMENTS |  |  |  |
Number of Class A Shares | 1.50% |  |  |
Private Placement Warrants | Exercise price |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ / shares | 11.50 | 11.50 |  |
Private Placement Warrants | Stock price |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ / shares | 9.97 | 10.35 |  |
Private Placement Warrants | Volatility |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.30 | 0.30 |  |
Private Placement Warrants | Probability of completing a Business Combination |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.85 | 0.85 |  |
Private Placement Warrants | Term |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ | 5.28 | 5.11 |  |
Private Placement Warrants | Risk-free rate |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.0041 | 0.0038 |  |
Private Placement Warrants | Dividend yield |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.00 | 0.00 |  |
Prosus Agreement Liability | Exercise price | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ |  | 500,000,000 | 400,000,000 |
Prosus Agreement Liability | Underlying value | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ |  | 550,300,000 | 436,800,000 |
Prosus Agreement Liability | Volatility | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  |  | 0.40 |
Prosus Agreement Liability | Term | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ |  | 0.33 | 0.08 |
Prosus Agreement Liability | Risk-free rate | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.0009 | 0.0010 |
Prosus Agreement Liability | Dividend yield | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.0000 | 0.0000 |
Black-Scholes Valuation | Private Placement Warrants | Exercise price |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ / shares |  | 11.50 |  | 11.50
Black-Scholes Valuation | Private Placement Warrants | Stock price |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ / shares |  | 10.35 |  | 10.44
Black-Scholes Valuation | Private Placement Warrants | Volatility |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.300 |  | 0.2000
Black-Scholes Valuation | Private Placement Warrants | Probability of completing a Business Combination |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.85 |  | 0.800
Black-Scholes Valuation | Private Placement Warrants | Term |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ |  | 5.11 |  | 5.33
Black-Scholes Valuation | Private Placement Warrants | Risk-free rate |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.3800 |  | 1.7400
Black-Scholes Valuation | Private Placement Warrants | Dividend yield |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities |  | 0.000 |  | 0.000
Black-Scholes Valuation | Conversion Option Liabilities | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Number of Class A Shares |  | 1.50% |  |
Estimated fair value liabilities | 1.92 |  |  |
Black-Scholes Valuation | Conversion Option Liabilities | Exercise price | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ / shares | 1.00 | 1.00 |  |
Black-Scholes Valuation | Conversion Option Liabilities | Volatility | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 1.25 | 1.10 |  |
Black-Scholes Valuation | Conversion Option Liabilities | Term | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | $ | 0.28 | 0.11 |  |
Black-Scholes Valuation | Conversion Option Liabilities | Risk-free rate | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.0009 | 0.0008 |  |
Black-Scholes Valuation | Conversion Option Liabilities | Dividend yield | Level 3 |  |  |  |
FAIR VALUE MEASUREMENTS |  |  |  |
Estimated fair value liabilities | 0.00 | 0.00 |  |

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