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STOCKHOLDERS’ EQUITY (DEFICIT) - Narrative (Details) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 05, 2021 USD ($) shares | Nov. 04, 2021 USD ($) shares | Dec. 31, 2021 USD ($) vote $ / shares shares | Dec. 31, 2020 USD ($) vote $ / shares shares | Dec. 31, 2019 USD ($) shares | Nov. 30, 2021 $ / shares | Sep. 30, 2021 $ / shares shares | Dec. 31, 2018 shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Capital stock authorized (in shares) |  |  | 2,220,000,000 | 230,192,013 |  |  | 2,275,812,755 |
Common stock, authorized (in shares) |  |  |  | 154,379,258 |  |  |  |
Preferred stock, shares authorized (in shares) | 20,000,000 |  | 20,000,000 | 0 |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  | 0 | 75,812,755 |  |  | 75,812,755 |
Convertible preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.0001 | $ 0.0001 |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  | 0.0001 |  | $ 0.0001 | $ 0.0001 |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.0001 | $ 0.0001 |  | $ 0.0001 | $ 0.0001 |
Common stock, reclassification ratio |  |  | 1 |  |  |  | 1 |
Conversion of convertible preferred stock to Class B common stock upon IPO (in shares) |  | 70,990,919 | 70,990,919 |  |  |  |  |
Conversion of convertible preferred stock to Class B common stock upon IPO | $ |  |  | $ 204,049 |  |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  | 0 | 70,990,919 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  | 0 | 70,990,919 | 62,187,015 |  |  | 60,239,135
Number of votes per share for common stock | vote |  |  |  | 1 |  |  |  |
Dividend percentage on shares of preferred stock |  |  | 8.00% |  |  |  |  |
Proceeds from initial public offering, net of underwriting discounts and commissions | $ | $ 50,000 |  | $ 236,964 | $ 0 | $ 0 |  |  |
Common stock, percentage of Class B outstanding (less than) |  |  | 10.00% |  |  |  |  |
Aggregate amount of shares the board of directors may fix the rights, preferences, privileges, and restrictions (in shares) | 20,000,000 |  | 20,000,000 |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 0 | 0 |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 0 | 0 |  |  |  |
Minimum |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Conversion of common stock, date fixed by the board of directors, period |  |  | 61 days |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Conversion of common stock, date fixed by the board of directors, period |  |  | 180 days |  |  |  |  |
Additional Paid-In Capital |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Conversion of convertible preferred stock to Class B common stock upon IPO | $ |  | $ 204,000 | $ 204,042 |  |  |  |  |
Class A Common Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, authorized (in shares) | 2,000,000,000 |  | 2,000,000,000 | 0 |  |  | 2,000,000,000 |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.0001 | $ 0.0001 |  |  |  |
Number of votes per share for common stock | vote |  |  | 1 |  |  |  |  |
Class B Common Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, authorized (in shares) | 200,000,000 |  | 200,000,000 | 154,379,258 |  |  | 200,000,000 |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.0001 | $ 0.0001 |  |  |  |
Number of votes per share for common stock | vote |  |  | 10 |  |  |  |  |
Series E |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 8,648,700 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 8,648,695 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 8,648,695 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | $ 11.56 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | 11.56 |  |  |  |  |
Series D |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 5,820,360 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 2,103,089 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 2,103,089 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 12.89 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | 12.89 |  |  |  |  |
Series C |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 4,559,065 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 4,559,065 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 4,559,065 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 10.97 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | 10.97 |  |  |  |  |
Series B |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 6,167,015 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 6,167,015 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 6,167,015 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 3.00 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | 3.00 |  |  |  |  |
Series A |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 26,212,040 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 26,212,040 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 26,212,040 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 0.28 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | 0.28 |  |  |  |  |
Series Seed |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares authorized (in shares) |  |  |  | 24,405,575 |  |  |  |
Convertible preferred stock, shares issued (in shares) |  |  |  | 23,301,015 |  |  |  |
Convertible preferred stock, shares outstanding (in shares) |  |  |  | 23,301,015 |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 0.10 |  |  |  |  |
Convertible preferred stock, conversion price (in dollars per share) | $ / shares |  |  | $ 0.10 |  |  |  |  |

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