Product Revenues, Net, Accounts Receivable, Net, and Reserves for Product Revenues - Summary of Product Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Product Information [Line Items]
Products, net	$ 360,548	$ 238,988	$ 720,032	$ 470,483
PMO Products [Member]
Product Information [Line Items]
Products, net	238,827	238,988	464,375	470,483
PMO Products [Member] | United States [Member]
Product Information [Line Items]
Products, net	204,248	203,895	393,915	404,346
PMO Products [Member] | Rest of World [Member]
Product Information [Line Items]
Products, net	34,579	35,093	70,460	66,137
ELEVIDYS [Member]
Product Information [Line Items]
Products, net	121,721	0	255,657	0
ELEVIDYS [Member] | United States [Member]
Product Information [Line Items]
Products, net	$ 121,721	$ 0	$ 255,657	$ 0