Revenue

3 Months Ended

Mar. 31, 2022

Revenue

Revenue

2.        Revenue

The Company recorded net revenue of $60.1 million and $83.0 million during the three months ended March 31, 2022 and 2021, respectively.

Gross revenues by significant customer as a percentage of total gross revenues are as follows:

	Three Months Ended
	March 31, 2022		March 31, 2021
McKesson Corporation	39	%	39	%
AmeriSource-Bergen Corporation	43	%	38	%
Cardinal Health, Inc.	17	%	21	%

Product Sales Discounts and Allowances

The activities and ending reserve balances for each significant category of discounts and allowances, which constitute variable consideration, were as follows:

	Three Months Ended March 31, 2022
	Chargebacks				Other Fees,
	and Discounts				Co-pay
	for Prompt				Assistance
(in thousands)	Payment		Rebates		and Returns		Total
Balances at December 31, 2021	$	29,665	$	54,004	$	26,054	$	109,723
Provision related to sales made in:
Current period		105,737		20,269		20,288		146,294
Prior period		(1,081)		(1,721)		(344)		(3,146)
Payments and customer credits issued		(107,625)		(24,216)		(22,440)		(154,281)
Balances at March 31, 2022	$	26,696	$	48,336	$	23,558	$	98,590

	Three Months Ended March 31, 2021
	Chargebacks				Other Fees,
	and Discounts				Co-pay
	for Prompt				Assistance
(in thousands)	Payment		Rebates		and Returns		Total
Balances at December 31, 2020	$	40,580	$	54,058	$	28,760	$	123,398
Provision related to sales made in:
Current period		114,670		30,233		25,130		170,033
Prior period		(2,316)		(1,888)		(823)		(5,027)
Payments and customer credits issued		(123,441)		(27,373)		(26,157)		(176,971)
Balances at March 31, 2021	$	29,493	$	55,030	$	26,910	$	111,433

Chargebacks and discounts for prompt payment are recorded as a reduction in trade receivables, and the remaining reserve balances are classified as current liabilities in the accompanying unaudited condensed consolidated balance sheets.