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Note 7 - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Property and equipment $ 4,429 $ 4,749
Accumulated depreciation (2,499) (2,480)
Property and equipment, net 1,930 2,269
Furniture and Fixtures [Member]    
Property and equipment 1,181 1,498
Machinery and Equipment [Member]    
Property and equipment 1,184 1,224
Leasehold Improvements [Member]    
Property and equipment 2,056 2,019
Construction in Progress [Member]    
Property and equipment $ 8 $ 8