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Note 10 - Revenues and Other Related Items - Revenue by Geography (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Revenues $ 3,755 $ 4,083
UNITED STATES    
Revenues 3,097 3,295
Non-US [Member]    
Revenues $ 658 $ 788