Note 16 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Dec. 20, 2018	Sep. 30, 2018
Operating Loss Carryforwards, Valuation Allowance	$ 57,700,000	$ 11,400,000		$ 2,100,000
Deferred Tax Asset And Related Valuation Allowance		2,700,000		$ 500,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	4,758,000	3,351,000
Deferred Tax Assets, Net, Total	$ 11,688,000	$ 6,930,000	$ 4,600,000

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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- Definition

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

No definition available.

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