Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Amortized cost of current investments	$ 141,876	$ 132,799
Allowance for credit losses	0	0
Allowance for credit losses, current	1,339	583
Amortized cost of non-current investments	285,376	250,790
Allowance for credit losses, non-current	$ 0	$ 0
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	400,000	400,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock par value (in dollars per share)	$ 0.002	$ 0.002
Common stock shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	171,662,000	171,599,000
Common stock, shares outstanding (in shares)	171,662,000	171,599,000