Product Revenues, Net, Accounts Receivable, Net, and Reserves for Product Revenues - Summary of Product Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Product Information [Line Items]
Products, net	$ 429,771	$ 309,322	$ 1,149,803	$ 779,805
PMO Products [Member]
Product Information [Line Items]
Products, net	248,788	240,214	713,163	710,697
PMO Products [Member] | United States [Member]
Product Information [Line Items]
Products, net	210,683	198,069	604,598	602,415
PMO Products [Member] | Rest of World [Member]
Product Information [Line Items]
Products, net	38,105	42,145	108,565	108,282
ELEVIDYS [Member]
Product Information [Line Items]
Products, net	180,983	69,108	436,640	69,108
ELEVIDYS [Member] | United States [Member]
Product Information [Line Items]
Products, net	$ 180,983	$ 69,108	$ 436,640	$ 69,108