Note 8 - Stockholders' Equity (Details Textual)		3 Months Ended		9 Months Ended		12 Months Ended		21 Months Ended
	Jul. 01, 2014 $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) shares	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Mar. 31, 2020 USD ($) $ / shares shares
Common Stock Voting Rights Votes Per Share				1
Shares Held by Subsidiaries (in shares)		704,309	704,309	704,309	704,309			704,309
Stock Issued During Period, Value, Issued for Services | $				$ 16,350	$ 45,256
Proceeds from the Sale of Units | $				1,159,000	792,365
Payments of Stock Issuance Costs | $				105,400	53,437
Adjustments to Additional Paid in Capital, Warrant Issued | $				$ 1,250	6,250
Class of Warrant or Right, Outstanding (in shares)		19,400,000		19,400,000				19,400,000
Weighted Average Exercise Price for Outstanding Warrants (in dollars per share) | $ / shares		$ 0.82
Weighted Average Remaining Contractual Life for Outstanding Warrants (Year)		2 years 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)				390,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $				$ 99,500	123,250
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $		$ 0		$ 0				$ 0
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		30,000,000		30,000,000				30,000,000
Share-based Payment Arrangement, Expense | $			$ 5,250	$ 99,500	$ 123,250
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)				390,000	350,000
Subscription Agreement [Member]
Share Price (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.50		$ 0.50				$ 0.50
Number of Shares Per Unit (in shares)		1		1				1
Number of Warrants Per Unit (in shares)		1		1				1
Sale of Units, Number Of Units Issued (in shares)				18,000
Proceeds from the Sale of Units | $				$ 9,000
Proceeds from Sale of Units, Net of Commissions | $				8,100
Payments of Stock Issuance Costs | $				$ 900
Stock Issued During Period, Shares, New Issues (in shares)				18,000
Class of Warrant or Right, Issued During Period (in shares)				9,000
Warrant Fair Value Price Per Share (in dollars per share) | $ / shares		$ 0.05		$ 0.05				$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $				$ 333
Adjustments to Additional Paid in Capital, Other | $				$ 8,667
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant (in shares)		0.5		0.5				0.5
Subscription Agreement [Member] | Restricted Stock [Member]
Number of Shares Per Unit (in shares)		1		1				1
Subscription Agreement Two [Member]
Share Price (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.50		$ 0.50				$ 0.50
Number of Warrants Per Unit (in shares)		1		1				1
Sale of Units, Number Of Units Issued (in shares)		2,000,001		2,000,001
Proceeds from the Sale of Units | $		$ 1,000,000		$ 1,000,000
Proceeds from Sale of Units, Net of Commissions | $		910,500		910,500
Payments of Stock Issuance Costs | $		$ 89,500		$ 89,500
Stock Issued During Period, Shares, New Issues (in shares)		2,000,000		2,000,000
Class of Warrant or Right, Issued During Period (in shares)		2,000,000		2,000,000
Warrant Fair Value Price Per Share (in dollars per share) | $ / shares		$ 0.05		$ 0.05				$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $		$ 48,604		$ 48,604
Adjustments to Additional Paid in Capital, Other | $		$ 951,396		$ 951,396
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant (in shares)		1		1				1
Subscription Agreement Two [Member] | Restricted Stock [Member]
Number of Shares Per Unit (in shares)		1		1				1
Subscription Agreement Three [Member]
Share Price (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.50		$ 0.50				$ 0.50
Number of Warrants Per Unit (in shares)		1		1				1
Sale of Units, Number Of Units Issued (in shares)		300,000		300,000
Proceeds from the Sale of Units | $		$ 150,000		$ 150,000
Proceeds from Sale of Units, Net of Commissions | $		135,000		135,000
Payments of Stock Issuance Costs | $		$ 15,000		$ 15,000
Stock Issued During Period, Shares, New Issues (in shares)		300,000		300,000
Class of Warrant or Right, Issued During Period (in shares)		300,000		300,000
Warrant Fair Value Price Per Share (in dollars per share) | $ / shares		$ 0.05		$ 0.05				$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $		$ 7,169		$ 7,169
Adjustments to Additional Paid in Capital, Other | $		$ 142,831		$ 142,831
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant (in shares)		1		1				1
Subscription Agreement Three [Member] | Restricted Stock [Member]
Number of Shares Per Unit (in shares)		1		1				1
Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.60		$ 0.60				$ 0.60
Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		2		$ 2				2
Maximum [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)				10 years
Employees and Consultants [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)				29,000
Stock Issued During Period, Value, Issued for Services | $				$ 16,350
Employees and Consultants [Member] | Minimum [Member]
Share Price (in dollars per share) | $ / shares		0.48		$ 0.48				0.48
Employees and Consultants [Member] | Maximum [Member]
Share Price (in dollars per share) | $ / shares		0.75		0.75				0.75
President [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Number of Shares Per Unit (in shares)		1		1				1
Number of Warrants Per Unit (in shares)		1		1				1
Deferred Compensation, Converted to Units, Amount | $				$ 3,828
Accounts Payable, Converted to Units, Amount | $				$ 52,830				$ 15,000
Deferred Compensation and Accounts Payable Converted to Units, Shares (in shares)				143,316
Deferred Compensation, Loan Payable, and Accounts Payable Converted to Units, Price Per Unit (in dollars per share) | $ / shares		$ 0.50		$ 0.50				$ 0.50
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1		1				1
President [Member] | Warrants Related to the Conversion of Deferred Compensation and Accounts Payable into Units [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Consultant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.74		$ 0.74				$ 0.74
Class of Warrant or Right, Issued During Period (in shares)				25,000
Class of Warrant or Right, Outstanding (in shares)		865,551		865,551				865,551
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		25,000		25,000				25,000
Class of Warrant or Right, Issued During the Period, Value Issued for Expenses | $				$ 1,250
Interest Expense Related to the Modification of Warrants | $				$ 36,239
Brokers [Member] | Warrants Issued as Commissions [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.75		$ 0.75				$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		219,689		219,689				219,689
Centerpoint [Member]
Shares Held by Subsidiaries (in shares)		704,309		704,309				704,309
Series B Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	200	200		200		200		200
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.01	$ 0.01		$ 0.01		$ 0.01		$ 0.01
Preferred Stock, Convertible Option Per Share (in dollars per share) | $ / shares	$ 2
Preferred Stock, Dividend Rate, Percentage	2.50%
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares	$ 100
Convertible Preferred Stock Redemption Period (Year)	3 years
Dividends, Preferred Stock, Total | $				$ 1,500		$ 2,000	$ 2,000
Dividends Payable | $		$ 17,500		$ 17,500				$ 17,500