Note 7 - Capital Transactions (Details) - USD ($)		1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 01, 2019	May 28, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jul. 12, 2019	Mar. 31, 2019	Dec. 04, 2018
Common Stock, Shares Authorized			600,000,000		600,000,000			600,000,000
Dividend					$ 230,025
Stock Issued During Period, Value, Conversion of Convertible Securities			$ 110,000	$ 3,296,021	280,000	$ 4,640,971
Share-based compensation expense					341,724	1,995,332
Convertible Secured Promissory Note
Debt Instrument, Face Amount			1,361,863		1,361,863
Convertible Secured Promissory Note | CSW Ventures
Debt Instrument, Face Amount	$ 1,361,863		1,330,000		1,330,000
Carrying Amount			1,338,057		1,338,057
Conversion price	$ 0.11	$ 0.17					$ 0.11
Interest expense	$ 9,579
Decrease in convertible notes payable	100,421	$ 152,775
Stock Issued During Period, Value, Conversion of Convertible Securities	$ 110,000	$ 170,000
Stock Issued During Period, Share, Conversion of Convertible Securities	1,000,000	1,000,000
Convertible Promissory Note
Debt Instrument, Face Amount			$ 2,765,000		$ 2,765,000
Convertible Promissory Note | CSW Ventures
Debt Instrument, Face Amount		$ 170,000
Carrying Amount		$ 152,775
Conversion price		$ 0.17
Warrant
Warrants issued to investors					70,500,000
Exercise price of warrants			$ 0.30		$ 0.30
Brokers fees					$ 94,498
Warrants issued					1,954,613
Warrants expiration date			Jun. 15, 2024		Jun. 15, 2024
Expense related to issuance of warrants					$ 132,914
Share-based compensation expense					$ 208,809
Warrant | Minimum
Exercise price of warrants			$ 0.30		$ 0.30
Warrant | Maximum
Exercise price of warrants			$ 0.65		$ 0.65
Common Stock
Exercise of warrants for stock, shares					12,657,875
Common stock issued					9,449,750
Proceeds from common stock issued					$ 850,478
Cancellation of Shares					(400,000)
Stock Issued During Period, Value, Conversion of Convertible Securities			$ 100	$ 1,318	$ 200	$ 1,856
Stock Issued During Period, Share, Conversion of Convertible Securities			1,000,000	13,184,087	2,000,000	18,563,885
Common Stock | Convertible Promissory Note
Debt Conversion, Converted Instrument, Shares Issued		1,000,000
Interest expense		$ 17,225
Private placement
Brokers fees					$ 71,529
Share Price									$ 0.60
Private placements description					Company entered into a Placement Agent’s Agreement to offer a total of 15,000,000 units at the price of $0.20 per unit up to a total of $3 million. Each unit consisted of one share of the Company’s common stock and one warrant to purchase one share of the Company’s common stock at the price of $0.60 for a period of five years. On January 15, 2019, the Placement Agent’s Agreement was amended to decrease the unit price from $0.20 per unit to $0.15 per unit for a total of 20,000,000 units and decrease the exercise price of the warrants included in each unit from $0.60 to $0.30, applied retroactively to funds raised prior to the date of the amendment, with no other changes to the agreement.
Proceeds from private placement					$ 478,696
Private placement | Minimum
Exercise price of warrants			$ 0.30		$ 0.30
Private placement | Maximum
Exercise price of warrants			$ 0.60		$ 0.60
Private placement | Warrant
Shares issued					3,668,167
Private placement | Common Stock
Shares issued					3,668,167
Consultant
Cancellation of Shares					400,000