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Revenue, Contract balances (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Revenue [Abstract]    
Revenue recognized $ 400  
Contract liabilities [Abstract]    
Unbilled receivables, current 90 $ 106
Unbilled receivables, net of current portion 20 32
Customer pre-payments (166) (164)
Deferred revenue, current (1,125) (1,107)
Deferred revenue, net of current portion (335) (246)
Total net contract liabilities $ (1,516) $ (1,379)