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Accrued expenses and other current liabilities - Schedule of warranty accruals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accrued Expenses and Other Current Liabilities Abstract
Balance at beginning of period	$ 6,811	$ 2,057	$ 0
Warranties issued during the period	8,588	7,866	2,057
Settlements made during the period	(5,270)	(3,111)	0
Changes in liability for pre-existing warranties	(783)	(1)	0
Balance at end of period	9,346	6,811	2,057
Accrued warranty balance reported in:
Other current liabilities	4,032	3,985	1,368
Other non-current liabilities	5,314	2,826	689
Balance at end of period	$ 9,346	$ 6,811	$ 2,057

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Accrued Expenses and Other Current Liabilities Abstract.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties.

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Amount of increase (decrease) in the standard product warranty accrual from changes in estimates attributable to preexisting product warranties. Excludes extended product warranties.

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Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties.

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