Warrant Transaction Agreements - Amazon.com, Inc. Transaction Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Class of Warrant or Right [Line Items]
Provision for common stock warrants	$ 9,124	$ 4,495
2022 Amazon transaction agreement
Class of Warrant or Right [Line Items]
Contract asset	$ 31,900		$ 33,200
Warrant shares vested (in shares)	3,000,000		3,000,000
Number of warrants exercised (in shares)	0	0	0
Provision for common stock warrants	$ 3,400	$ 700
2017 Amazon Transaction Agreement
Class of Warrant or Right [Line Items]
Warrant shares vested (in shares)	55,286,696		55,286,696
Number of warrants exercised (in shares)	0	0
2017 Amazon Transaction Agreement | Amazon
Class of Warrant or Right [Line Items]
Number of warrants exercised (in shares)	34,917,912		34,917,912
Provision for common stock warrants	$ 100	$ 100