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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Note 5 - Stockholders' Equity, Stock Options and Warrants (Details Textual) - USD ($)			3 Months Ended			6 Months Ended
	May 16, 2022	Oct. 24, 2019	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	May 15, 2022
Stock Issued During Period, Value, New Issues			$ 6,507,050
Share-Based Payment Arrangement, Expense			39,383		$ 33,243	$ 75,901	$ 598,325
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount			30,234			$ 30,234
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						21 years
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						27 months
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			$ 72,296			$ 72,296
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares)			366,666			366,666
Maximum [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)				10 years
Maximum [Member] \| Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years
Warrants Issued with First May 2022 Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	3,837,280
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.70
Warrants and Rights Outstanding, Term (Year)	5 years 6 months
Existing Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	16,325,433
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.70
Warrants and Rights Outstanding, Term (Year)	5 years 6 months
Existing Warrants [Member] \| Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)								$ 1.00
Existing Warrants [Member] \| Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)								$ 2.00
Placement Agent Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.75
Sale of Stock, Placement Agent, Warrants Assigned, Number of Securities Called by Warrants, Percent of Shares Sold	7.50%
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent of Stock Price	125.00%
May 2022 First Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	3,837,280
Shares Issued, Price Per Share (in dollars per share)	$ 0.60
May 2022 Second Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	8,162,720
Shares Issued, Price Per Share (in dollars per share)	$ 0.60
May 2022 Offerings [Member]
Sale of Stock, Agent Placement Fee, Percent of Gross Proceeds	7.50%
Sale of Stock, Management Fee, Percent of Gross Proceeds	1.00%
Maximum Expenses Reimbursable to Placement Agent	$ 65,000
Equity Line Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		104,651				315,000
Issuance or Sale of Equity, Can Be Raised		$ 15,000,000
Stock Issued During Period, Value, New Issues		$ 450,000				$ 236,009
Sale of Stock, Remaining Available Balance			$ 8,877,820			$ 8,877,820