Note 5 - Leases - Schedule of Supplemental Lease Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Operating Lease, Right-of-Use Asset	$ 206	$ 295
Current operating lease liability	186	$ 279
Long-term operating lease liability	$ 0
Weighted average remaining lease term (Year)	7 months 6 days
Weighted average discount rate	0.90%

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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