Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2021

Allocation of compensation expense related to options

The weighted-average grant-date fair value of the options granted in the six months ended June 30, 2021 and 2020 were $81.37 and $33.51 per share, respectively. The Group recorded compensation expense related to the options of $12,776 and $10,355 for the six months ended June 30, 2021 and 2020, respectively, which were classified in the accompanying unaudited condensed consolidated statements of operations as follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	$		$		$		$
Selling, general and administrative		4,123		2,804		7,382		5,548
Research and development		3,104		2,630		5,394		4,807

Total		7,227		5,434		12,776		10,355

Allocation of compensation expense related to restricted shares

As of June 30, 2021, there was $40,562 of total unrecognized compensation expense related to

non-vested

restricted shares. The Group recorded compensation expense related to the restricted shares of $4,774 and $3,072 for the six months ended June 30, 2021 and 2020, respectively, which were classified in the accompanying unaudited condensed consolidated statements of operations as follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	$		$		$		$
Selling, general and administrative		1,839		1,046		3,050		2,114
Research and development		1,166		484		1,724		958

Total		3,005		1,530		4,774		3,072