Revenue

6 Months Ended

Jun. 30, 2021

Revenue

Revenue

9. Revenue

The Group’s revenue is derived from the sale of ZEJULA, Optune and QINLOCK in China and Hong Kong. The table below presents the Group’s net product sales for the three and six months ended June 30, 2021 and 2020.

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
	$			$			$			$
Product revenue - gross		41,380			11,478			87,935			20,415
Less: Rebate and sales return		(4,445	)		(483	)		(30,897	)		(1,202	)
Product revenue - net		36,935			10,995			57,038			19,213

Sales rebates are offered to distributors in China and the amounts are recorded as a reduction of revenue. Estimated rebates are determined based on contracted rates, sales volumes and level of distributor inventories.

The following table disaggregates net revenue by product for the three and six months ended June 30, 2021 and 2020:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	$		$		$		$
ZEJULA		23,366		7,446		35,972		13,791
Optune		9,535		3,549		16,665		5,422
QINLOCK		4,034		—		4,401		—
Product revenue - net		36,935		10,995		57,038		19,213