Product Warranty

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Product Warranties Disclosures [Abstract]

PRODUCT WARRANTY

7. PRODUCT WARRANTY

Movement of product warranty was as follows:

	Three months ended June 30,						Six months ended June 30,
	2020			2021			2020			2021
Balance at beginning of the period	$	17,299		$	19,105		$	18,416		$	19,356
Provided during the period		842			8,148			951			9,057
Utilized during the period		(783	)		(1,710	)		(2,009	)		(2,870	)
Balance at end of the period	$	17,358		$	25,543		$	17,358		$	25,543

	December 31, 2020		June 30, 2021
Product warranty – current	$	4,296	$	10,299
Product warranty – non-current		15,060		15,244
Total	$	19,356	$	25,543

10. PRODUCT WARRANTY

Movement of product warranty was as follows:

	December 31, 2019			December 31, 2020
Balance at beginning of the year	$	16,565		$	18,416
Provided during the year		3,501			3,477
Utilized during the year		(1,650	)		(2,537	)
Balance at end of the year	$	18,416		$	19,356
Product warranty – current	$	3,723		$	4,296
Product warranty – non-current		14,693			15,060

The warranty costs recorded were $8,342, $3,501 and $3,477 during the years ended December 31, 2018, 2019 and 2020, respectively.