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Note 9 - Related-party Debt (Details Textual) - USD ($)
$ in Thousands
9 Months Ended
Sep. 05, 2022
Mar. 31, 2024
Mar. 31, 2023
Repayments of Related Party Debt   $ (0) $ 500
Interest Paid, Excluding Capitalized Interest, Operating Activities   $ 21 $ 66
Secured Promissory Note (2019 Note) [Member]      
Repayments of Related Party Debt $ 500    
Interest Paid, Excluding Capitalized Interest, Operating Activities $ 55