STOCK-BASED COMPENSATION - Non-Cash Stock-Based Compensation Awards (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | $ 54,960 | $ 1,730 | $ 1,747 |
| Capitalized internal use software | |||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | 543 | 0 | 0 |
| Sales and marketing expenses | |||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | 3,378 | 0 | 0 |
| General and administrative expenses | |||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | $ 51,039 | $ 1,730 | $ 1,747 |