| EXECUTIVE COMPENSATION - Additional Information (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |
|---|---|---|---|---|---|
| Jun. 30, 2021  item  shares | Sep. 30, 2021  shares | Sep. 30, 2021  $ / shares  shares | Dec. 31, 2020  $ / shares | Dec. 31, 2019  $ / shares | |
| Granted | 2,357,500 | ||||
| Profits interest exercise price | $ / shares | $ 3.25 | $ 3.25 | $ 2.50 | ||
| Members' Equity, Class B | |||||
| Granted | 1,540,000 | ||||
| Number of executives pursuant to new employment | item | 3 | ||||
| Members' Equity, Class B | Non-Employee | |||||
| Granted | 75,000 | ||||
| Members' Equity, Class B | Common Stock | |||||
| Purchase to grants in options | 770,000 | ||||
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- Definition It represents the number of executives pursuant to new employment agreements. No definition available. 
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- Definition Per share of exercise price of share based compensation membership interest. No definition available. 
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- Definition The number of shares purchase to grants in options. No definition available. 
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- Definition Gross number of share options (or share units) granted during the period. No definition available. 
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