Note 7 - Derivatives - Change in Fair Value of Derivative Liabilities (Details) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Derivative liability balance	$ 129,480	$ 294,382
Gain recognized to revalue derivative instrument at fair value	(1,908)	(95,671)
Derivative liability balance	$ 127,572	$ 198,711

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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