Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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The amount of the liability for the conversion option reclassified to stockholders' equity when the embedded option no longer required separation from the host instrument.

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

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Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Note 7 - Derivatives - Change in Fair Value of Derivative Liabilities (Details) - USD ($)	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Derivative liability balance	$ 198,711	$ 294,382	$ 2,814,798	$ 50,989
Gain recognized to revalue derivative instrument at fair value	30,909	(95,671)	422,081	(27,107)
Reclassification of Warrant liabilities to Equity on exercise			(1,701,756)
Derivative liability balance	$ 229,620	$ 198,711	4,629,570	2,814,798
A, B and Agent Warrants [Member]
Derivative instrument recognized				2,669,995
Promissory Note 2020 [Member]
Derivative instrument recognized				$ 120,921
Warrant Issued in Connection With May 2020 Offering [Member]
Derivative instrument recognized			1,324,184
June 2020 Warrant [Member]
Derivative instrument recognized			1,749,721
Promissory Note 2020 2 [Member]
Derivative instrument recognized			$ 20,542