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WARRANTS - Narrative (Details) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Nov. 04, 2021 shares | Jul. 31, 2018 $ / shares shares | Mar. 31, 2022 USD ($) $ / shares shares | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) shares
Class of Warrant or Right [Line Items] |  |  |  |  |
Conversion ratio | 1 |  |  |  |
Class of warrant or right, outstanding (in shares) |  |  | 0 |  | 0
Preferred stock warrant liability | $ |  |  | $ 0 |  | $ 0
Marketing expense | $ |  |  | $ 13,827,000 | $ 12,718,000 |
July 2018 - Allotment 1 |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Exercise price of warrants or rights (in dollars per share) | $ / shares |  | $ 1.28 | $ 1,280 |  |
Warrants issued (in shares) |  | 122,735 | 122,735 |  |
Percent of warrants to vest immediately upon issuance |  | 50.00% |  |  |
Vesting period for warrants or rights |  | 24 months |  |  |
July 2018 - Allotment 2 |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Exercise price of warrants or rights (in dollars per share) | $ / shares |  | $ 1.28 | $ 1,280 |  |
Warrants issued (in shares) |  | 184,100 | 184,100 |  |
Vesting period for warrants or rights |  | 36 months |  |  |
Class B Common Stock |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Stock issued from conversion of preferred stock (in shares) | 1,104,560 |  |  |  |
VLL Agreement |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of securities called by warrants or rights (in shares) |  |  | 1,104,560 |  |
Exercise price of warrants or rights (in dollars per share) | $ / shares |  |  | $ 0.10 |  |
Fair value of warrants or rights | $ |  |  | $ 800,000 |  |
West Investments V, LLC | Affiliated Entity |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Marketing expense | $ |  |  | $ 700,000 | $ 100,000 |

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