PRODUCT REVENUES, NET, ACCOUNTS RECEIVABLE AND RESERVES FOR PRODUCT REVENUES (Tables)

12 Months Ended

Dec. 31, 2021

Receivables, Net, Current [Abstract]

Schedule of product revenues

The following table summarizes the Company's product revenues, net disaggregated by product for the periods indicated:

	For the Year Ended December 31,
	2021		2020		2019
	(in thousands)
EXONDYS 51	$	454,361	$	422,007	$	380,718
VYONDYS 53		89,511		33,858		115
AMONDYS 45		68,529		—		—
Products, net	$	612,401	$	455,865	$	380,833

Summary of Components of Accounts Receivable

The following table summarizes the components of the Company’s accounts receivable for the periods indicated:

	As of December 31,
	2021		2020
	(in thousands)
Product sales receivable, net of discounts and allowances	$	152,990	$	100,870
Government contract receivables		—		470
Total accounts receivable, net	$	152,990	$	101,340

Summary of Change in Reserves for Discounts and Allowances

The following table summarizes an analysis of the change in reserves for discounts and allowances for the periods indicated:

	Chargebacks			Rebates			Prompt Pay			Other Accruals			Total
	(in thousands)
Balance, as of December 31, 2019	$	588		$	44,738		$	1,506		$	4,671		$	51,503
Provision		9,700			52,180			6,384			10,175			78,439
Payments/credits		(8,007	)		(55,147	)		(5,941	)		(9,877	)		(78,972	)
Balance, as of December 31, 2020	$	2,281		$	41,771		$	1,949		$	4,969		$	50,970
Provision		13,308			78,637			9,400			16,107			117,452
Payments/credits		(14,790	)		(59,902	)		(8,551	)		(14,713	)		(97,956	)
Balance, as of December 31, 2021	$	799		$	60,506		$	2,798		$	6,363		$	70,466

Summary of Total Reserves Included in Consolidated Balance Sheets

The following table summarizes the total reserves above included in the Company’s consolidated balance sheets for the periods indicated:

	As of December 31,
	2021		2020
	(in thousands)
Reduction to accounts receivable	$	8,321	$	8,352
Component of accrued expenses		62,145		42,618
Total reserves	$	70,466	$	50,970