Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2018
Notes payable
Cash and cash equivalents	$ 63,401	$ 75,054	$ 58,442	$ 93,120
Restricted cash			403,758	0
Total cash, cash equivalents, and restricted cash per statements of cash flows	$ 63,401	$ 75,054	$ 462,200	$ 93,120
Convertible Debt
Notes payable
Debt instrument, interest rate, stated percentage					0.625%