STOCK‐BASED COMPENSATION - Common Stock Warrants Narrative (Details)				1 Months Ended	12 Months Ended
	Sep. 18, 2025 USD ($)	Mar. 21, 2025 USD ($) shares	Dec. 31, 2024 shares	Mar. 31, 2023 USD ($) year $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)		59,284
Warrants authorized (in shares)		355,702
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares				$ 0.002
Exercised using cash in exchange (in shares)				1
Warrants and rights outstanding, term (in periods)				10 years
Days after termination of advisory services				30 days
Warrants and rights outstanding | $		$ 12,700,000
Issued in exchange of common stock | $		7,000,000.0
Stock-based compensation expense | $	$ 1,400,700,000				$ 1,447,700,000	$ 7,700,000	$ 34,900,000
Issuing the remaining authorized stock (in shares)					276,657	79,045
Warrants exercised, intrinsic value | $					$ 10,700,000	$ 3,100,000
Warrants outstanding (in shares)			414,986		0	414,986
Common stock warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 2,100,000			$ 3,000,000.0	$ 4,800,000	$ 4,900,000
Unrecognized expense | $					$ 0
Advisory Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)				256,896
Warrants and rights outstanding | $				$ 9,200,000
Advisory Warrants | Expected term (in years)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants and rights outstanding, measurement input | year				2.3
Initiative Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)			39,522
Warrants authorized (in shares)				237,135
Warrants and rights outstanding | $				$ 8,400,000
Warrants for Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares					$ 0.002
Warrants outstanding (in shares)			217,373		0	217,373