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Accrued expense and other current liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Accrued Liabilities, Current [Abstract]    
Accrued employee compensation and benefits expense $ 3,410 $ 4,796
Accrued vendor expenses 2,357 2,336
Accrued warranty expense 159 889
Accrued taxes 147 269
Other 50 26
Total accrued expenses and other current liabilities $ 6,123 $ 8,316