Note 3 - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Right-of-use operating lease asset	$ 25,911	$ 51,405
Operating lease liability - current	$ 18,363	$ 45,595

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

Name:	us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant