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Note 10 - Revenues and Other Related Items - Revenue by Geography (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenues $ 4,206 $ 3,445 $ 4,206 $ 3,445 $ 12,609 $ 9,155
UNITED STATES            
Revenues     3,325 1,978 9,944 6,495
Non-US [Member]            
Revenues     $ 881 $ 1,467 $ 2,665 $ 2,660