Share Capital and Share Premium (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Classes Of Share Capital [Abstract]

Summary of Shares

Shares

	December 31, 2021		December 31, 2020
	US$’000		US$’000
Authorized:
2,000,000,000 shares of US$0.0001 each		200		200
Issued and fully paid:
308,456,852 (2020: 266,010,256) ordinary shares of US$0.0001 each		31		27

Summary of Movements in the Company's Share Capital and Share Premium

A summary of movements in the Company’s share capital and share premium is as follows:

	Number of shares in issue		Share capital		Share premium		Total
			US$’000		US$’000		US$’000
At December 31, 2019 and January 1, 2020		200,000,000	20			3,908		3,928
Issuance of ordinary shares for conversion of preferred    shares		20,907,282	2			240,432		240,434
Issuance of ordinary shares for initial public offering, net    of issuance cost		42,377,500	4			450,081		450,085
Issuance of ordinary shares for private placement by    GenScript		1,043,478	—			12,000		12,000
Exercise of share options		1,681,996	1			1,885		1,886
At December 31, 2020 and January 1, 2021		266,010,256		27		708,306		708,333
Issuance of ordinary shares relating to    private placement for an institutional investor (note 24)		20,809,850		2		218,298		218,300
Issuance of ordinary shares for follow-on public offering,    net of issuance cost (note)		17,231,150		2		323,438		323,440
Exercise of share options		4,056,380		—		6,089		6,089
Reclassification of vesting of restricted stock    units		349,216		—		5,323		5,323
At December 31, 2021		308,456,852		31		1,261,454		1,261,485