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Note 13 - Subsequent Events (Details Textual) - $ / shares	Nov. 10, 2023	Sep. 30, 2023	Jan. 23, 2012
Shares Issued, Price Per Share (in dollars per share)			$ 19
Common Stock [Member]
Shares Issued, Price Per Share (in dollars per share)		$ 5.97
Common Stock [Member] | Subsequent Event [Member]
Shares Issued, Price Per Share (in dollars per share)	$ 1.24
Warrant [Member]
Shares Issued, Price Per Share (in dollars per share)		$ 0.045
Warrant [Member] | Subsequent Event [Member]
Shares Issued, Price Per Share (in dollars per share)	$ 0.0202

X

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: