Note 16 - Income Taxes (Details Textual) - USD ($) $ in Millions			1 Months Ended	9 Months Ended
Jun. 30, 2022	Oct. 16, 2019	Oct. 31, 2019	Jun. 30, 2021	Dec. 20, 2018
Deferred Tax Assets, Net, Total					$ 4.6
Series A Cumulative Convertible Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage	8.00%	8.00%	8.00%	8.00%

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

Name:	us-gaap_DeferredTaxAssetsLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant