6. Accounts Receivable, net (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Schedule of accounts receivable

The accounts receivable consisted of the following: 

	December 31,			December 31,
	2020			2019
Accounts receivable	$	17,306		$	17,001
Less: Allowance for doubtful accounts		(245	)		(462	)
Accounts receivable, net	$	17,061		$	16,539

Allowance for doubtful accounts rollforward

The movements of allowance for doubtful accounts are as follows:

	2020			2019			2018
Balance as of January 1	$	462		$	633		$	1,520
Addition		187			101			202
Written off		(396	)		(45	)		–
Reversal		(12	)		(225	)		(1,002	)
Foreign currency translation difference		4			(2	)		(87	)
Balance as of December 31	$	245		$	462		$	633