Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Denominator:
Weighted-average number of shares of common stock - basic (in shares)		171,348,000	165,723,000	170,067,000	164,337,000
Weighted-average number of shares of common stock - diluted (in shares)		171,348,000	165,723,000	170,067,000	164,337,000
Net loss per share attributable to common stockholders:
Basic (in dollars per share)		$ (0.14)	$ (0.10)	$ (0.27)	$ (0.33)
Diluted (in dollars per share)		$ (0.14)	$ (0.10)	$ (0.27)	$ (0.33)
Common Stock Class A
Numerator:
Net loss attributable to common stockholders		$ (24,465)	$ (14,734)	$ (46,580)	$ (47,932)
Denominator:
Weighted-average number of shares of common stock - basic (in shares)		171,348,000	152,334,000	170,067,000	147,061,000
Weighted-average number of shares of common stock - diluted (in shares)		171,348,000	152,334,000	170,067,000	147,061,000
Net loss per share attributable to common stockholders:
Basic (in dollars per share)		$ (0.14)	$ (0.10)	$ (0.27)	$ (0.33)
Diluted (in dollars per share)		$ (0.14)	$ (0.10)	$ (0.27)	$ (0.33)
Conversion of stock, shares issued (in shares)	3,550,142
Common Stock Class B
Numerator:
Net loss attributable to common stockholders			$ (1,295)		$ (5,631)
Denominator:
Weighted-average number of shares of common stock - basic (in shares)			13,389,000		17,276,000
Weighted-average number of shares of common stock - diluted (in shares)			13,389,000		17,276,000
Net loss per share attributable to common stockholders:
Basic (in dollars per share)			$ (0.10)		$ (0.33)
Diluted (in dollars per share)			$ (0.10)		$ (0.33)