Bank Borrowings (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Bank Borrowings [Abstract]

Schedule of various loan agreements

	Three months ended June 30,					Six months ended June 30,
	2020		2021			2020			2021
Beginning balance	$	5,649	$	13,156		$	11,922		$	12,184
Proceeds from bank borrowings		3,714		13,158			9,473			26,603
Repayments of principal		—		—			(11,894	)		(12,265	)
Exchange difference		22		(144	)		(89	)		(64	)
Ending balance	$	9,412	$	26,458		$	9,412		$	26,458

	December 31, 2020		June 30, 2021
Current	$	12,184	$	16,572
Non-current		—		9,886
Total	$	12,184	$	26,458

	December 31, 2019			December 31, 2020
Beginning balance as of January 1	$	66,267		$	11,922
Proceeds from bank borrowings		17,735			17,308
Repayments of principal during the year		(71,674	)		(17,815	)
Exchange difference		(406	)		769
Ending balance as of December 31	$	11,922		$	12,184
Including:
Current	$	11,922		$	12,184
Total	$	11,922		$	12,184

Schedule of banking facilities and aggregate carrying amount

	December 31, 2020		June 30, 2021
Buildings	$	22,732	$	31,877
Machinery and equipment		19,297		17,835
Land use rights		2,789		4,466
Total	$	44,818	$	54,178

	December 31, 2019		December 31, 2020
Buildings	$	22,414	$	22,732
Machinery and equipment		20,936		19,297
Land use rights		2,672		2,789
Total	$	46,022	$	44,818