Accrued expenses and other current liabilities - Schedule of warranty accruals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Accrued Expenses and Other Current Liabilities [Abstract]
Balance at beginning of period	$ 11,851	$ 10,472	$ 11,904	$ 11,002
Warranties issued and remediation added during the period	569	801	1,614	1,639
Settlements made during the period	(585)	(443)	(1,241)	(1,292)
Changes in liability for pre-existing warranties	(25)	(415)	(467)	(934)
Balance at end 's period	11,810	10,415	11,810	10,415
Warranty accruals are reported in:
Other current liabilities	9,861	7,264	9,861	7,264	$ 9,482
Other non-current liabilities	1,949	3,151	1,949	3,151
Balance at end of period	$ 11,810	$ 10,415	$ 11,810	$ 10,415	$ 11,904