Note 9 - Cash Dividends (Details Textual) - USD ($)	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Oct. 31, 2020
Payments of Dividends, Total	$ 1,300,000
Dividends Accrued	$ 81,663	$ 34,842
Subsequent Event [Member]
Quarterly Indicated Per Share Dividend Rate (in dollars per share)			$ 0.05
Annual Indicated per Share Dividend Rate (in dollars per share)			$ 0.20

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration