EQUITY-BASED COMPENSATION EXPENSE - Schedule of Stock Options Roll Forward (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares
Number of Options
Outstanding beginning balance (in shares) | shares	3,252
Granted (in shares) | shares	9,936
Exercised (in shares) | shares	(171)
Forfeited (in shares) | shares	(107)
Expired (in shares) | shares	(92)
Outstanding ending balance (in shares) | shares	12,818	3,252
Exercisable (in shares) | shares	3,866
Weighted-Average Exercise Price
Outstanding beginning balance (in dollars per share) | $ / shares	$ 1.78
Granted (in dollars per share) | $ / shares	0.36
Exercised (in dollars per share) | $ / shares	0.35
Forfeited (in dollars per share) | $ / shares	1.05
Expired (in dollars per share) | $ / shares	1.50
Outstanding ending balance (in dollars per share) | $ / shares	0.70	$ 1.78
Exercisable (in dollars per share) | $ / shares	$ 1.45
Stock Options Additional Disclosures
Weighted average remaining contractual term (in years)	1 year 10 months 24 days	3 years
Exercisable, weighted average remaining contractual term (in years)	2 years 1 month 6 days
Exercised, intrinsic value | $	$ 61
Outstanding aggregate intrinsic value | $	3,207	$ 0
Exercisable, intrinsic value | $	$ 351