Note 7 - Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Property and equipment	$ 5,325	$ 5,099
Depreciation expense	450	403
Accumulated depreciation and amortization	(3,774)	(3,342)
Property and equipment, net	1,551	1,757
Furniture and Fixtures [Member]
Property and equipment	1,582	1,432
Machinery and Equipment [Member]
Property and equipment	1,441	1,391
Leasehold Improvements [Member]
Property and equipment	2,302	2,172
Construction in Progress [Member]
Property and equipment	$ 0	$ 104

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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