Note 10 - Long-term Debt - Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Total Debt	$ 702	$ 1,000
Debt Instruments, Excluding Paycheck Protection Program Liability [Member]
Total Debt	702	1,017
Less current portion:	(267)	(429)
Long-term debt, net of current portion	435	588
Debt Instruments, Excluding Paycheck Protection Program Liability [Member] | Vendor Loan [Member]
Total Debt	385	389
Debt Instruments, Excluding Paycheck Protection Program Liability [Member] | Term Loans, One [Member]
Total Debt	317	292
Debt Instruments, Excluding Paycheck Protection Program Liability [Member] | Term Loans, Two [Member]
Total Debt	0	292
Debt Instruments, Excluding Paycheck Protection Program Liability [Member] | Seller Note [Member]
Total Debt	$ 0	$ 44