The following table shows the allocation of share-based compensation between research and development and selling, general and administrative costs (in thousands):


	Three months ended June 30,				Six months ended June 30,
	2023		2022		2023		2022
Research and development	$	1,123	$	1,330	$	2,226	$	2,869
Selling, general and administrative	3,951		1,723		7,138		3,932
Total	$	5,074	$	3,053	$	9,364	$	6,801

The following table shows share option activity, in ordinary shares, in the period:


						Number of share options outstanding
Balance as of December 31, 2022						19,276,496
Granted						1,320,000
Forfeited						(240,000)

Exercised						(1,050,192)
Balance as of March 31, 2023						19,306,304
Granted						2,824,000

Expired						(80,000)
Exercised						(120,000)
Balance as of June 30, 2023						21,930,304

The following table shows restricted stock unit (“RSU”) activity, in ordinary shares, in the period:


						Number of RSUs outstanding
Balance as of December 31, 2022						34,542,344


Vested						(4,305,120)
Balance as of March 31, 2023						30,237,224


Vested						(3,680,224)
Balance as of June 30, 2023						26,557,000