Accounts Receivable (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Receivables [Abstract]

Schedule of accounts receivable

	December 31, 2020			June 30, 2021
Accounts receivable	$	81,345		$	69,996
Allowance for doubtful accounts		(5,047	)		(4,743	)
Accounts receivable, net	$	76,298		$	65,253

	December 31, 2019			December 31, 2020
Accounts receivable	$	73,178		$	81,345
Allowance for doubtful accounts		(5,537	)		(5,047	)
Accounts receivable, net	$	67,641		$	76,298

Schedule of allowance for doubtful accounts

	Three months ended June 30,					Six months ended June 30,
	2020		2021			2020			2021
Balance at beginning of the period	$	4,524	$	4,416		$	5,537		$	5,047
Charge to expenses		—		318			(863	)		(196	)
Write off		—		(28	)		—			(131	)
Exchange difference		10		37			(140	)		23
Balance at end of the period	$	4,534	$	4,743		$	4,534		$	4,743

	December 31, 2019			December 31, 2020
Balance at beginning of year	$	10,111		$	5,537
Charge to expenses		(4,250	)		(240	)
Write off		(233	)		(493	)
Exchange difference		(91	)		243
Balance at end of year	$	5,537		$	5,047