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Note 14 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenue $ 43 $ 12
Transferred at Point in Time [Member]    
Revenue 9 4
Transferred over Time [Member]    
Revenue 34 8
Service [Member]    
Revenue 9 0
Rentals [Member]    
Revenue $ 34 $ 12