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Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Accumulated deficit	$ (1,022,986)	$ (1,022,986)		$ (910,743)
Net cash used in operating activities		$ (90,805)	$ (53,026)
Sale of Stock, Description of Transaction		the exercise of the Warrants may be settled in cash upon the occurrence of a tender offer or exchange that involves more than 50% of the outstanding shares of the Company’s Common Stock.
Cash and cash equivalents and marketable securities	$ 607,700	$ 607,700
Warrants to purchase common stock outstanding	5,787,472	5,787,472
Class of warrant or right, exercise price of warrants or rights	$ 11.5	$ 11.5
U.S [Member]
Revenue From Contract With Customer Including Assessed Tax	$ 1,200
China [Member]
Revenue From Contract With Customer Including Assessed Tax	3,400
Japan [Member]
Revenue From Contract With Customer Including Assessed Tax	200
Royalty Arrangement [Member]
Revenue From Contract With Customer Including Assessed Tax	$ 200	$ 500
Class A Common Stock [Member]
Warrants to purchase common stock outstanding	5,787,472	5,787,472
Sales Revenue Net \| Customer Concentration Risk
Concentration Risk Threshold Percentage		10.00%
Accounts Receivable \| Customer Concentration Risk
Concentration Risk Threshold Percentage		10.00%
Public Warrants [Member]
Warrants to purchase common stock outstanding	4,791,639	4,791,639
Private Placement Warrants [Member]
Warrants to purchase common stock outstanding	162,500	162,500
Forward Purchase Warrants [Member]
Warrants to purchase common stock outstanding	833,333	833,333
Consideration Warrants [Member] \| Class A Common Stock [Member]
Warrants to purchase common stock outstanding	2,893,720	2,893,720
Class of warrant or right, exercise price of warrants or rights	$ 11.5	$ 11.5
Fair Value O fWarrants Trading Price	$ 0.26	$ 0.26
Computer Equipment [Member]
Property and equipment, estimated useful life	5 years	5 years
Furniture and Equipment [Member]
Property and equipment, estimated useful life	7 years	7 years