Note 6 - Capital Transactions (Details Textual)			12 Months Ended
	Sep. 09, 2022 USD ($)	May 09, 2022 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2022	Sep. 30, 2022
Proceeds from Warrant Exercises | $			$ 235,777	$ 0
Class of Warrant or Right, Cancelled During Period (in shares)			38,337,538	9,201,000
Proceeds from Issuance of Private Placement | $			$ 221,650
Class of Warrant or Right, Issued During Period (in shares)			23,006,492	56,835,004
Private Placement [Member]
Sale of Units, Maximum Units Allowed in Private Placement | $	$ 2,000,000	$ 565,000
Sale of Units, Price Per Unit (in dollars per share) | $ / shares		$ 0.03
Number of Common Stock Received, Per Unit (in shares)		1
Stock Issued During Period, Shares, New Issues (in shares)			56,835,004
Warrants Issued to Investor [Member]
Class of Warrant or Right, Repriced (in shares)			92,657,209
Class of Warrant or Right, Reinstated (in shares)			23,006,492
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 0.01
Deemed Dividend for Reissuance of Warrants | $			$ 278,315
Warrants at Exercise Price of 0.10 [Member]
Class of Warrant or Right, Extended (in shares)			3,490,834
Class of Warrant or Right, Extended, Exercise Price (in dollars per share) | $ / shares			$ 0.1
Warrant at Exercise Price of 0.06 [Member]
Class of Warrant or Right, Extended (in shares)			4,295,500
Class of Warrant or Right, Extended, Exercise Price (in dollars per share) | $ / shares			$ 0.6
Warrant at Exercise Price of 0.04 [Member]
Class of Warrant or Right, Extended (in shares)			300,000
Class of Warrant or Right, Extended, Exercise Price (in dollars per share) | $ / shares			$ 0.04
Warrants [Member]
Class of Warrant or Right, Extended (in shares)			2,456,750
Class of Warrant or Right, Extended, Exercise Price (in dollars per share) | $ / shares			$ 0.1
Class of Warrant or Right, Exercises in Period (in shares)			25,348,467
Class of Warrant or Right, Exercises in Period, Exercise Price (in dollars per share) | $ / shares			$ 0.01
Proceeds from Warrant Exercises | $			$ 253,529
Brokerage Fees, Exercise of Warrants | $			$ 17,752
Class of Warrant or Right, Cancelled During Period (in shares)			1,150,000
Payments for Repurchase of Warrants | $			$ 0
Warrants Issued to Investors in Private Placements [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.1	$ 0.1
Number of Warrant Received, Per Unit (in shares)		1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1	1
Warrants and Rights Outstanding, Term (Year)			5 years			5 years
Class of Warrant or Right, Issued During Period (in shares)			56,835,004
Compensation Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 0.03
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			1
Warrants and Rights Outstanding, Term (Year)			5 years
Class of Warrant or Right, Issued During Period (in shares)			5,416,834
Warrants and Rights Outstanding | $			$ 147,879
Compensation Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input					0.0273