Note 16 - Related Party Transactions (Details Textual) - USD ($)		12 Months Ended
Jun. 13, 2017	Dec. 31, 2019	Dec. 31, 2018
Bonhoeffer Fund, LP [Member]
Revenue from Related Parties		$ 38,599	$ 26,196
Willow Oak Capital Management, LLC [Member]
Revenue from Related Parties		1,521	610
Arquitos Capital Management, LLC [Member]
Revenue from Related Parties		28,405	41,632
Arquitos Investment Manager, LP [Member]
Revenue from Related Parties		$ 100,461	$ 17,614
Willow Oak Asset Management LLC [Member]
Percentage of Performance and Management Fees Earned	50.00%

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=116637345&loc=SL114874292-224272

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration