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Revenue, Contract balances (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Revenue [Abstract]    
Revenue recognized $ 1,000  
Contract liabilities [Abstract]    
Unbilled receivables, current 41 $ 106
Unbilled receivables, net of current portion 4 32
Customer pre-payments (34) (164)
Deferred revenue, current (1,143) (1,107)
Deferred revenue, net of current portion (343) (246)
Total net contract liabilities $ (1,475) $ (1,379)