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Note 8 - Property and Equipment, Net - Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Property and equipment $ 4,521 $ 4,429
Accumulated depreciation (2,636) (2,499)
Property and equipment, net 1,885 1,930
Furniture and Fixtures [Member]    
Property and equipment 1,244 1,181
Machinery and Equipment [Member]    
Property and equipment 1,193 1,184
Leasehold Improvements [Member]    
Property and equipment 2,056 2,056
Construction in Progress [Member]    
Property and equipment $ 28 $ 8