Income Tax (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Loss Before Income Taxes

Loss before income taxes consists of:

	Year ended December 31,
	2017			2018		2019
	$			$		$
Cayman		3,887			1,218		(3,241	)
BVI		8			2		2
PRC		40,972			127,711		185,239
HK		6,240			7,778		3,271
US		—			2,351		9,786
AUST		(723	)		15		14
		50,384			139,075		195,071

Schedule of Reconciliations of PRC Statutory Income Tax Rate and Group's Effective Income Tax Rate

Reconciliations of the differences between the PRC statutory income tax rate and the Group’s effective income tax rate for the years ended December 31, 2017, 2018 and 2019 are as follows:

	Year ended December 31,
	2017			2018			2019
Statutory income tax rate		25	%		25	%		25	%
Share-based compensations		(3.27	%)		(1.93	%)		(1.51	%)
Non-deductible expenses		(0.79	%)		(0.38	%)		(0.39	%)
Prior year tax filing adjustment		—			1.55	%		1.93	%
Effect of different tax rate of subsidiary    operation in other jurisdictions		(3.06	%)		(0.76	%)		0.07	%
Preferential tax rate		—			—			(9.14	%)
Effect of change in tax rate		—			—			(9.15	%)
Changes in valuation allowance		(17.88	%)		(23.48	%)		(6.81	%)
Effective income tax rate		—			—			—

Schedule of Components of Deferred Tax Assets and Liabilities

The principal components of the deferred tax assets and liabilities are as follows:

	Year ended December 31,
	2017			2018			2019
	$			$			$
Deferred tax assets:
Depreciation of property and equipment, net		6			15			57
Government grants		188			187			325
Net operating loss forwards		17,075			49,726			62,833
Less: valuation allowance		(17,269	)		(49,928	)		(63,215	)
Deferred tax assets, net		—			—			—

Schedule of Movement of Valuation Allowance

Movement of the valuation allowance is as follows:

	2018			2019
	$			$
Balance as of January 1,		(17,269	)		(49,928	)
Additions		(32,659	)		(13,287	)
Balance as of December 31,		(49,928	)		(63,215	)