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Note 5 - Property and Equipment, Net - Schedule of Depreciation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Depreciation $ 406 $ 439 $ 1,240 $ 1,283
General and Administrative Expense [Member]        
Depreciation 67 66 200 200
Research and Development Expense [Member]        
Depreciation $ 339 $ 373 $ 1,040 $ 1,083