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Note 10 - Revenues and Other Related Items - Revenue by Geography (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Revenues $ 4,083 $ 4,286
UNITED STATES    
Revenues 3,295 3,360
Non-US [Member]    
Revenues $ 788 $ 926