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Note 15 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Revenue $ 299 $ 10 $ 342 $ 22
Transferred at Point in Time [Member]        
Revenue 267 3 276 7
Transferred over Time [Member]        
Revenue 32 7 66 15
Service [Member]        
Revenue 223 10 232 22
Rentals [Member]        
Revenue 32 0 66 0
Product [Member]        
Revenue 44 0 44 0
Product and Service, Other [Member]        
Revenue $ 0 $ 0 $ 0 $ 0