REVENUES (Tables)

6 Months Ended

Jun. 30, 2022

REVENUES

Schedule of revenues disaggregated by category

Revenues disaggregated by category were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Product sales:
Gross product sales	$	26,427	$	22,037	$	49,045		38,146
Discounts and allowances		(7,877)		(4,984)		(14,298)		(8,717)
Total product sales, net		18,550		17,053		34,747		29,429
Revenues from collaborations:
License revenues		2,337		3,305		2,545		67,923
Development milestones		5,000		—		5,000		—
Research and development services and others		3,932		408		4,262		1,432
Total revenues from collaborations		11,269		3,713		11,807		69,355
Government contract		—		5,500		—		8,500
Total revenues	$	29,819	$	26,266	$	46,554	$	107,284

Schedule of product revenue allowance and reserve categories

	Chargebacks,		Government
	Discounts and		and Other
	Fees		Rebates		Returns		Total
Balance as of January 1, 2022	$	3,404	$	2,494	$	2,017	$	7,915
Provision related to current period sales		9,680		2,711		613		13,004
Credit or payments made during the period		(7,748)		(2,901)		(39)		(10,688)
Balance as of June 30, 2022	$	5,336	$	2,304	$	2,591	$	10,231

	Chargebacks,		Government
	Discounts and		and Other
	Fees		Rebates		Returns		Total
Balance as of January 1, 2021	$	2,461	$	2,115	$	1,489	$	6,065
Provision related to current period sales		4,589		2,710		483		7,782
Credit or payments made during the period		(4,800)		(2,433)		(293)		(7,526)
Balance as of June 30, 2021	$	2,250	$	2,392	$	1,679	$	6,321

Schedule of revenues from product sales disaggregated by customers

The following table summarizes the percentages of revenues from each of our customers who individually accounted for 10% or more (wherein * denotes less than 10%) of the total net product sales and revenues from collaborations:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
McKesson Specialty Care Distribution Corporation		34%		33%		36%		13%
Kissei		25%		*		16%		*
Cardinal Healthcare		16%		13%		20%		*
ASD Healthcare and Oncology Supply		12%		36%		19%		13%
Lilly		*		16%		*		65%