Accrued expenses and other current liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued cost of revenue	$ 19,885	$ 13,033
Related party accrued cost of revenue	5,915	1,718
Accrued compensation	2,699	3,687
Other accrued expenses	1,911	1,696
Total accrued expenses	30,410	20,134
Warranty reserves	9,861	9,482	$ 7,264
Current portion of operating lease liability	$ 493	$ 755
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total other current liabilities	Total other current liabilities
Non-federal tax obligations	$ 102	$ 76
Total other current liabilities	$ 10,456	$ 10,313