Note 7 - Capital Transactions (Details Textual) - USD ($)											1 Months Ended		3 Months Ended			9 Months Ended
	Dec. 31, 2019	Dec. 16, 2019	Nov. 27, 2019	Nov. 18, 2019	Oct. 30, 2019	Oct. 10, 2019	Oct. 01, 2019	Aug. 01, 2019	Jul. 12, 2019	May 28, 2019	Dec. 31, 2019	Nov. 18, 2019	Dec. 31, 2019	Jul. 11, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Oct. 23, 2019	Aug. 15, 2019	Jul. 10, 2019	Apr. 23, 2019	Mar. 31, 2019	Feb. 28, 2019	Jan. 15, 2019	Dec. 04, 2018	Apr. 08, 2018	Apr. 07, 2018
Common Stock, Shares Authorized	600,000,000										600,000,000		600,000,000			600,000,000			600,000,000			600,000,000				400,000,000	250,000,000
Debt Conversion, Converted Instrument, Shares Issued																7,583,333
Induced Conversion of Convertible Debt Expense													$ 127,059			$ 127,059
Exercise of Warrants for Stock, Shares																12,574,750
Stock Issued During Period, Shares, Issued for Services							2,000,000									2,500,000
Consulting Service Expense																$ 214,000
Stock Issued During Period, Shares, New Issues																7,668,167
Proceeds from Issuance of Common Stock and Warrants						$ 240,000
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 15,131										$ 15,131		$ 15,131			$ 15,131
Employees and Consultants [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense																$ 241,242
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	10,383,334										10,383,334		10,383,334			10,383,334
Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	2,383,000										2,383,000		2,383,000			2,383,000
Private Placement [Member]
Brokerage Fees for Issuance of Common Stock and Warrants																$ 71,529
Units of Common Stock and Warrants, Authorized																								20,000,000	15,000,000
Units of Combined Common Stock and Warrants, Price Per Unit																								$ 0.15	$ 0.20
Units of Combined Common Stock and Warrants, Value																									$ 3,000,000
Proceeds from Issuance of Private Placement																$ 478,696
Warrants Issued to Investors in Private Placements [Member]
Class of Warrant or Right, Outstanding														70,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.04										$ 0.04		$ 0.04			$ 0.04
Class of Warrant or Right, Temporarily Reduced Exercise Price of Warrants or Rights														$ 0.10
Class of Warrant or Right, Exercises in Period									9,449,750		3,125,000
Proceeds from Warrant Exercises									$ 850,478		$ 112,500
Brokerage Fees for Issuance of Common Stock and Warrants									94,498		12,500
Inducement Dividend, Exercise of Warrants	$ 37,499								$ 230,025		$ 37,499		$ 37,499			$ 37,499
Warrants Issued to Investors in Private Placements [Member] | Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 0.65
Warrants Issued to Investors in Private Placements [Member] | Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 0.30
Warrants Issued In the Private Placement on December 4, 2018 [Member] | Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.30										$ 0.30		$ 0.30			$ 0.30								$ 0.30	$ 0.60
Units of Combined Common Stock and Warrants, Warrants Per Unit																									1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																									1
Warrants and Rights Outstanding, Term																									5 years
Class of Warrant or Right, Issued																3,668,167
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1										1		1			1
Warrants Issued to an Investor on October 10, 2019 [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.08
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right						1
Warrants and Rights Outstanding, Term						3 years
Class of Warrant or Right, Issued						2,000,000
Warrants and Rights Outstanding						$ 110,000
Warrants Issued to Broker Participating in Private Placement on December 4, 2018 [Member]
Class of Warrant or Right, Outstanding	87,526,411										87,526,411		87,526,411			87,526,411
Warrants Issued to Broker Participating in Private Placement on December 4, 2018 [Member] | Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.30										$ 0.30		$ 0.30			$ 0.30
Class of Warrant or Right, Issued	1,954,613
Class of Warrant or Right, Expense	$ 132,914
Warrants Issued to Broker Participating in Private Placement on December 4, 2018 [Member] | Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1										1		1			1
Warrants Issued to Broker Participating in Private Placement on December 4, 2018 [Member] | Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.30										$ 0.30		$ 0.30			$ 0.30
Common Stock [Member]
Exercise of Warrants for Stock, Shares													3,125,000			12,574,750	12,657,875
Stock Issued During Period, Shares, Issued for Services													2,500,000		2,341,568	2,500,000	3,885,412
Stock Issued During Period, Shares, New Issues						4,000,000							4,000,000		3,470,000	7,668,167	23,747,778
Cancellation of Shares Issued for Services																400,000
Common Stock [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues																3,668,167
Units of Combined Common Stock and Warrants, Shares Per Unit																									1
Senior Secured Convertible Promissory Note [Member] | The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member]
Debt Conversion, Original Debt, Amount		$ 120,000						$ 110,000		$ 170,000
Debt Instrument, Interest Rate, Stated Percentage									8.00%	8.00%													8.00%
Debt Instrument, Unamortized Discount, Total	$ 584,842	57,551						9,579		$ 17,225	$ 584,842		$ 584,842			$ 584,842
Debt Instrument, Increase (Decrease), Net, Total		(62,449)	$ 30,000					(100,421)	$ 100,000	(152,775)
Short-term Debt, Total	687,021	$ 1,271,863	$ 1,361,863					$ 1,361,863	$ 1,338,057	$ 1,330,000	687,021		687,021			687,021		$ 1,269,067
Senior Secured Convertible Promissory Note [Member] | The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member] | Common Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued		3,000,000						1,000,000		1,000,000
Debt Instrument, Convertible, Conversion Price		$ 0.04	$ 0.04					$ 0.11	$ 0.11	$ 0.17								$ 0.08					$ 0.17
Convertible Notes Payable [Member] | The 8% Convertible Promissory Note Dated April 23, 2019 [Member]
Debt Conversion, Converted Instrument, Shares Issued				1,333,333	1,250,000
Debt Conversion, Original Debt, Amount				$ 50,000	$ 75,000							$ 125,000
Debt Instrument, Interest Rate, Stated Percentage																					8.00%
Debt Instrument, Convertible, Conversion Price				$ 0.0375	$ 0.06							$ 0.0375									$ 0.17
Debt Instrument, Unamortized Discount, Total																					$ 265,000
Short-term Debt, Total	$ 2,497,686										$ 2,497,686		2,497,686			2,497,686
Induced Conversion of Convertible Debt Expense				$ 62,353	$ 64,706								$ 127,059			$ 127,059