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Note 7 - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Property and equipment $ 5,099 $ 4,685
Depreciation expense 403 406
Accumulated depreciation and amortization (3,342) (2,930)
Property and equipment, net 1,757 1,755
Furniture and Fixtures [Member]    
Property and equipment 1,432 1,261
Machinery and Equipment [Member]    
Property and equipment 1,391 1,270
Leasehold Improvements [Member]    
Property and equipment 2,172 2,154
Construction in Progress [Member]    
Property and equipment $ 104 $ 0