STOCKHOLDERS’ EQUITY - Schedule of Common Stock Reserved for Future Issuances (Details)	Sep. 30, 2024 shares
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	741,477,878
Private Placement Warrants to purchase common stock
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	44,350,000
Stock options outstanding
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	28,845,241
Restricted stock units outstanding
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	116,174,433
Shares available for future grants under equity plans
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	51,144,960
If-converted common shares from convertible note
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	36,737,785
If-converted common shares from Series A redeemable convertible preferred stock
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	291,019,450
If-converted common shares from Series B redeemable convertible preferred stock
Class of Stock [Line Items]
Total shares of common stock reserved (in shares)	173,206,009