Product Warranty (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2022

Dec. 31, 2021

Product Warranties Disclosures [Abstract]

Schedule of movement of product warranty

Movement of product warranty was as follows:

	Three Months Ended March 31,
	2021			2022
Balance at beginning of the period	$	19,356		$	58,458
Provided during the period		909			2,685
Utilized during the period		(1,160	)		(9,712	)
Balance at end of the period	$	19,105		$	51,431

	Year Ended December 31,
	2019			2020			2021
Balance at beginning of the period	$	16,565		$	18,416		$	19,356
Provided for new sales during the period		3,501			3,477			6,447
Provided for pre-existing legacy product		—			—			46,485
Utilized during the year		(1,650	)		(2,537	)		(13,830	)
Balance at end of the year	$	18,416		$	19,356		$	58,458
Product warranty – current	$	3,723		$	4,296		$	20,922
Product warranty – non-current		14,693			15,060			37,536

Schedule of warranty cost

	December 31, 2021		March 31, 2022
Product warranty – current	$	20,922	$	17,420
Product warranty – non-current		37,536		34,011
Total	$	58,458	$	51,431