Note 13 - Common Dividends, Dividend Equivalents and Distributions - Common Dividends, Dividend Equivalents and Distributions Declared (Details) - USD ($)				3 Months Ended
Mar. 15, 2022	Mar. 15, 2021	Feb. 27, 2021	Mar. 31, 2022	Mar. 31, 2021
Amount per Share (in dollars per share)	$ 0.33	$ 0.08	$ 0.15	$ 0.33	$ 0.23
Dividends, Dividend Equivalents and Distributions Paid Date	Apr. 14, 2022	Mar. 29, 2021	Mar. 22, 2021
Dividends, Dividend Equivalents and Distributions Amount	$ 7,200,400	$ 809,665	$ 1,518,070	$ 7,200,400	$ 2,327,735

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

Name:	us-gaap_Dividends
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration