Note 12 - Employee Benefit Plans - Changes in Benefit Plan Liabilities (Details) - NQDC Plan [Member] - USD ($)	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Beginning deferred compensation balance	$ 113,600	$ 47,674
Employer contributions	80,510	52,400
Earnings	7,084	13,526
Ending deferred compensation balance	$ 201,194	$ 113,600

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

No definition available.

Name:	us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant