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Note 7 - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Property and equipment, gross $ 5,142 $ 5,099
Accumulated depreciation (3,387) (3,342)
Property and equipment, net 1,755 1,757
Furniture and Fixtures [Member]    
Property and equipment, gross 1,436 1,432
Machinery and Equipment [Member]    
Property and equipment, gross 1,404 1,391
Leasehold Improvements [Member]    
Property and equipment, gross 2,302 2,172
Construction in Progress [Member]    
Property and equipment, gross $ 0 $ 104