Product Revenues, Net, Accounts Receivable, Net, and Reserves for Product Revenues - Summary of Product Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Product Information [Line Items]
Products, net	$ 611,523	$ 359,484
PMO Products [Member]
Product Information [Line Items]
Products, net	236,538	225,548
PMO Products [Member] | United States [Member]
Product Information [Line Items]
Products, net	185,828	189,667
PMO Products [Member] | Rest Of World [Member]
Product Information [Line Items]
Products, net	50,710	35,881
ELEVIDYS [Member]
Product Information [Line Items]
Products, net	611,523	359,484
ELEVIDYS [Member] | United States [Member]
Product Information [Line Items]
Products, net	374,985	133,936
ELEVIDYS [Member] | Rest Of World [Member]
Product Information [Line Items]
Products, net	$ 374,985	$ 133,936