INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2020

INCOME TAXES

Schedule of current and deferred component of income tax expenses (benefit)

	Years ended December 31,
	2018		2019		2020
Current income tax expense (benefit)	$	862	$	(1,920)	$	(1,528)
Deferred income tax expense		—		—		—
Total income tax expense (benefit)	$	862	$	(1,920)	$	(1,528)

Schedule of principal components of the deferred tax assets and liabilities

	As of December 31,
	2019		2020
Deferred tax assets
Provision for doubtful accounts	$	2,165	$	2,249
Inventory		4,510		4,510
Prepaid expenses and other current assets		5,629		4,865
Property and equipment, net		124		124
Accrued payroll and welfare		107		119
Accrued liabilities		345		357
Advertising fee		5		6
Employee education fee		13		13
Net operating loss carry forwards		10,738		12,811
Total Deferred tax assets	$	23,636	$	25,054
Less: valuation allowance		(23,636)		(25,054)
Deferred income tax assets, net	$	—	$	—
Deferred income liabilities	$	—	$	—
Net Deferred income tax assets	$	—	$	—

Schedule of reconciliation between statutory income tax expense and actual income tax expense

	Years Ended December 31,
	2018			2019			2020
Loss before provision of income tax	$	(88,076)		$	(70,988)		$	(6,848)
PRC statutory income tax rate		25	%		25	%		25	%
Income tax at statutory tax rate		(22,019)			(17,747)			(1,712)
Accrual (reversal) of taxable deemed interest income from inter-company interest-free loans		2,108			(2,259)			(1,593)
Impairment of goodwill		—			18,523			—
Fair value change on contingent consideration		—			(16,399)			—
Non-taxable income		—			(234)			—
Non-deductible loss and other expenses not deductible for tax purposes		15,644			298			109
Effect of income tax rate differences in jurisdictions other than the PRC		3,234			2,313			1,128
Effect of tax holiday		(53)			305			147
Tax effect of tax rate change		—			—			(1,025)
Changes in valuation allowance		1,948			13,280			1,418
Income tax expenses	$	862		$	(1,920)		$	(1,528)

Summary of rollforward of valuation allowances of deferred tax assets

	Year Ended December 31, 2020
Balance as of beginning of year	$	23,636
Additions of valuation allowance		546
Utilization of deferred tax assets		(153)
Change in tax rate		1,025
Balance as of the end of the year	$	25,054