STOCKHOLDERS' EQUITY AND NET LOSS PER SHARE - Antidilutive Securities (Details) - shares shares in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities (in shares) | 116 | 658 |
| Stock warrants | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities (in shares) | 12 | 12 |
| Contingently redeemable convertible preferred stock | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities (in shares) | 0 | 561 |
| Stock options | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities (in shares) | 65 | 67 |
| Restricted stock units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities (in shares) | 39 | 18 |