Product Revenue

12 Months Ended

Dec. 31, 2023

Product Revenue [Member]

Product Revenue

3. Product Revenue

To date, our only source of product revenue has been from the U.S. sales of XPOVIO. The following table summarizes activity in each of the product revenue allowance and reserve categories (in thousands):

	Discounts and Chargebacks			Fees, Rebates, and Other Incentives			Returns			Total
Beginning balance at January 1, 2021	$	2,079		$	2,193		$	669		$	4,941
Provision (reversal) related to sales in the current year		13,546			7,849			(235	)		21,160
Credits or payments made		(13,714	)		(7,736	)		(90	)		(21,540	)
Ending balance at December 31, 2021		1,911			2,306			344			4,561
Provision related to sales in the current year		17,920			9,979			219			28,118
Credits or payments made		(16,966	)		(8,551	)		(21	)		(25,538	)
Ending balance at December 31, 2022		2,865			3,734			542			7,141
Provision related to sales in the current year		21,106			11,025			—			32,131
Credits or payments made		(21,455	)		(10,089	)		(224	)		(31,768	)
Ending balance at December 31, 2023	$	2,516		$	4,670		$	318		$	7,504

Discounts and chargebacks are recorded as reductions of accounts receivable, and returns, fees, rebates, and other incentives are recorded as a component of accrued expenses and other liabilities.

As of December 31, 2023 and 2022, net product revenue of $17.8 million and $23.6 million, respectively, was included in accounts receivable, net.