Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 20, 2026 USD ($) $ / shares	Jul. 19, 2026 shares	Jan. 31, 2026 USD ($)	Sep. 30, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($)	Dec. 31, 2025 $ / shares shares	Oct. 24, 2025 $ / shares
Stock-based compensation
Recapitalization exchange ratio	0.282895
Vested stock options outstanding (in shares)				7,411,997		7,411,997		6,564,102
Stock-based compensation expense | $				$ 41,944	$ 2,831	$ 47,581	$ 7,845
RSUs released (in shares)				130,592
Vesting of restricted stock units, net of shares withheld for taxes (in shares)				58,672
Shares withheld for tax withholding obligation (in shares)				71,920
Unrecognized compensation cost | $				$ 21,000		21,000
Unrecognized compensation cost, options | $				$ 10,100		$ 10,100
Exercise price (in dollars per share) | $ / shares				$ 11.27		$ 11.27		$ 11.28
Estimated incremental stock compensation cost | $			$ 1,900
Incremental stock-based compensation expense | $				$ 500		$ 1,300
RSUs
Stock-based compensation
Stock-based compensation expense | $	$ 39,700
Outstanding (in shares)				3,879,655		3,879,655		4,093,826
Weighted average period for recognition of cost						1 year 4 months 24 days
Unrecognized compensation cost, excluding options | $				$ 10,900		$ 10,900
RSUs | Share-Based Payment Arrangement, Tranche One
Stock-based compensation
Outstanding (in shares)				2,840,776		2,840,776
Options
Stock-based compensation
Weighted average period for recognition of cost						2 years
2026 Equity Incentive Plan
Stock-based compensation
Total reserved shares for issuance of common stock (in shares)		14,773,227		2,600,000		2,600,000
Percentage of outstanding stock maximum		5.00%
2026 Employee Stock Purchase Plan
Stock-based compensation
Total reserved shares for issuance of common stock (in shares)		2,462,204		2,462,204		2,462,204
Percentage of outstanding stock maximum		1.00%
Purchase price of common stock, percent		85.00%
Number of additional shares allowable under the plan (in shares)		1,500,000
2016 Amended Plan
Stock-based compensation
Exercise price (in dollars per share) | $ / shares	$ 8.45								$ 2.39