Note 8 - Stockholders' Equity (Details Textual)				12 Months Ended
	Nov. 07, 2017 USD ($)	Feb. 10, 2015 $ / shares shares	Jul. 01, 2014 $ / shares shares	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Nov. 06, 2017 USD ($)	Jun. 30, 2016 shares	May 15, 2013
Common Stock Voting Rights Votes Per Share				1
Shares Held by Subsidiaries					704,309		704,309
Share Price | $ / shares					$ 0.75
Stock Issued During Period, Value, Issued for Services | $				$ 42,583	$ 158,636
Stock Issued During Period, Shares, New Issues					30,467
Stock Issued During Period, Value, New Issues | $					$ 22,850
Proceeds from the Sale of Units | $				$ 350,496	421,413
Class of Warrant or Right, Issued During Period				3,460,000
Adjustments to Additional Paid in Capital, Warrant Issued | $				$ 48,350	5,250
Common Stock Conversions, Inducements | $				10,784
Proceeds from Warrant Exercises | $				$ 67,841
Class of Warrant or Right, Outstanding				12,200,000
Weighted Average Exercise Price for Outstanding Warrants | $ / shares				$ 1.06
Weighted Average Remaining Contractual Life for Outstanding Warrants				3 years 109 days
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $				$ 296,852
Share-based Compensation, Total | $				$ 2,129,112	$ 530,795
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				2,647,500	319,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $				$ 1,376,250	$ 173,520
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $				$ 0
Expired [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				454,465
Warrants Issued as Commissions [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 1
Class of Warrant or Right, Issued During Period				89,485
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				89,485
Warrants in Connection with Services [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				917,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%
Class of Warrant or Right, Aggregate Purchase Price of Warrants or Rights | $				$ 45,850
Warrants with Extended Expiration Dates [Member]
Class of Warrant or Right, Outstanding				5,773,706
Subscription Agreement [Member]
Share Price | $ / shares				$ 1	$ 1
Stock Issued During Period, Shares, New Issues				267,331	561,890
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75	$ 0.75
Number of Warrants Per Unit				1	1
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant				0.5	0.5
Sale of Units, Number Of Units Subscribed				267,331	561,890
Proceeds from the Sale of Units | $				$ 200,496	$ 421,413
Proceeds from Sale of Units, Net of Commissions | $				$ 185,621	$ 390,773
Class of Warrant or Right, Issued During Period				133,666	280,949
Warrant Fair Value Price Per Share | $ / shares				$ 0.05	$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $				$ 6,152	$ 11,701
Adjustments to Additional Paid in Capital, Other | $				$ 194,344	$ 409,712
Subscription Agreement Two [Member]
Share Price | $ / shares				$ 0.75
Stock Issued During Period, Shares, New Issues				300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.50
Number of Warrants Per Unit				1
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant				0.5
Sale of Units, Number Of Units Subscribed				300,000
Proceeds from the Sale of Units | $				$ 150,000
Class of Warrant or Right, Issued During Period				150,000
Warrant Fair Value Price Per Share | $ / shares				$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $				$ 4,991
Adjustments to Additional Paid in Capital, Other | $				$ 145,009
Subscription Agreement Three [Member]
Stock Issued During Period, Shares, New Issues				3,441
Class of Warrant or Right, Exercised During Period				135,681
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 1
Class of Warrant or Right, Reduced Exercise Price From Previous Exercise Price of Warrants or Rights | $ / shares				$ 0.50
Common Stock Conversions, Inducements | $				$ 10,784
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total				135,681
Proceeds from Warrant Exercises | $				$ 67,841
Restricted Stock [Member] | Subscription Agreement [Member]
Number of Shares Per Unit				1	1
Restricted Stock [Member] | Subscription Agreement Two [Member]
Number of Shares Per Unit				1
Restricted Stock [Member] | Subscriptions Receivable [Member]
Stock Issued During Period, Shares, New Issues					10,000
Stock Issued During Period, Value, New Issues | $					$ 7,500
Class of Warrant or Right, Exercised During Period					10,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				30,000,000
Allocated Share-based Compensation Expense, Total | $				$ 1,369,350	$ 152,333
Stock Option Held by Employees and Consultants [Member]
Share-based Compensation, Total | $				$ 349,656
Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Minimum [Member] | Expired [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				1
Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				3
Maximum [Member] | Expired [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 2.50
Maximum [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
Employees and Consultants [Member]
Stock Issued During Period, Shares, Issued for Services					205,499
Stock Issued During Period, Value, Issued for Services | $					$ 158,636
Stock Issued During Period, Shares, New Issues				57,790
Stock Issued During Period, Value, New Issues | $				$ 42,583
Employees and Consultants [Member] | Stock Bonus [Member]
Stock Issued During Period, Value, New Issues | $					100,000
Allocated Share-based Compensation Expense, Total | $				$ 22,321	$ 37,105
Employees and Consultants [Member] | Minimum [Member]
Share Price | $ / shares				$ 0.52	$ 0.75
Employees and Consultants [Member] | Maximum [Member]
Share Price | $ / shares				0.91	$ 1.02
Consultants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Number of Shares Per Unit				1
Number of Warrants Per Unit				1
Deferred Compensation Converted to Common Stock Amount | $					$ 140,502
Deferred Compensation Converted to Common Stock Shares					184,542
Deferred Compensation, Converted to Units, Amount | $				$ 60,178
Deferred Compensation Converted to Units, Shares				120,356
Deferred Compensation Converted to Units, Price Per Unit | $ / shares				$ 0.50
Class of Warrant or Right, Outstanding				60,178
Consultants [Member] | Warrants Related to Deferred Compensation Conversions [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares					$ 1
Class of Warrant or Right, Issued During Period					79,614
Consultants [Member] | Warrants Related to the Conversion of Deferred Compensation Into Units [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right				0.5
Consultants [Member] | Minimum [Member]
Deferred Compensation, Stock Conversion, Price Per Share | $ / shares					$ 0.75
Consultants [Member] | Maximum [Member]
Deferred Compensation, Stock Conversion, Price Per Share | $ / shares					$ 0.84
President [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 1.50
Deferred Compensation, Converted to Units, Amount | $					$ 75,000
Accounts Payable, Converted to Units, Amount | $					$ 62,067
Deferred Compensation and Accounts Payable Converted to Units, Shares					182,758
Deferred Compensation and Accounts Payable Converted to Units, Price Per Unit | $ / shares					$ 0.75
Deferred Compensation and Accounts Payable Converted to Units, Number of Shares Per Unit					1
Deferred Compensation and Accounts Payable Converted to Units, Number of Warrants Per Unit					1
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $				$ 7,310
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 | $ / shares					$ 1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right					0.5
President [Member] | Warrants in Connection with Services [Member]
Class of Warrant or Right, Issued During Period				670,000
Class of Warrant or Right, Aggregate Purchase Price of Warrants or Rights | $				$ 33,500
President [Member] | Warrants with Extended Expiration Dates [Member]
Class of Warrant or Right, Outstanding				91,371
President [Member] | Stock Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		150,000
Chief Executive Officer [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Number of Shares Per Unit				1
Number of Warrants Per Unit				1
Deferred Compensation, Converted to Units, Amount | $				$ 70,000
Accounts Payable, Converted to Units, Amount | $				$ 65,540
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right				0.5
Debt Conversion, Original Debt, Amount | $				$ 18,000
Deferred Compensation, Loan Payable, and Accounts Payable Converted to Units, Shares				307,080
Deferred Compensation, Loan Payable, and Accounts Payable Converted to Units, Price Per Unit | $ / shares				$ 0.50
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $				$ 265,353
Chief Executive Officer [Member] | Replacement Note Held as Collateral [Member]
Convertible Notes Payable, Total | $	$ 130,000			130,000
Chief Executive Officer [Member] | Secured Promissory Note, Consideration for Warrants Expired on December 31, 2020 [Member]
Convertible Notes Payable, Total | $				$ 130,000
Chief Executive Officer [Member] | Bassani Warrants, Expired on December 31, 2021 [Member[
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares					$ 1
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					800,000
Chief Executive Officer [Member] | Bassani Warrants, Expired on December 31, 2020 [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				1,765,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%
Chief Executive Officer [Member] | Warrants in Connection with Services [Member]
Class of Warrant or Right, Issued During Period				1,765,000
Chief Executive Officer [Member] | Warrants with Extended Expiration Dates [Member]
Class of Warrant or Right, Outstanding				5,329,869
Chief Executive Officer [Member] | Secured Promissory Note, Consideration for Bassani Warrants [Member]
Financing Receivable, Net, Total | $	41,513				$ 40,000	$ 40,000
Financing Receivable, Interest Rate, Stated Percentage					4.00%
Financing Receivable , Increase, Accrued Interest | $	$ 1,513
Chief Executive Officer [Member] | Secured Promissory Note, Consideration for Warrants Expired on December 31, 2020 [Member]
Financing Receivable, Net, Total | $				$ 88,250
Financing Receivable, Interest Rate, Stated Percentage				4.00%
Chief Executive Officer [Member] | Stock Bonus [Member]
Execution Bonus as Percentage of Exercised Options and Warrants								50.00%
Chief Executive Officer [Member] | Stock Option Held by Employees and Consultants [Member]
Share-based Compensation, Total | $				$ 119,350
Various Warrant Holders [Member] | Subscription Agreement [Member]
Share Price | $ / shares				$ 1
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Number of Warrants Per Unit				1
Warrant Component of Equity Unit, Number of Shares of Restricted Common Stock Called by Each Warrant				0.5
Various Warrant Holders [Member] | Restricted Stock [Member] | Subscription Agreement [Member]
Number of Shares Per Unit				1
Two Former Employees [Member] | Two Former Employees Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				928,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%
Two Former Employees [Member] | Secured Promissory Note, Consideration for Warrants Issue to Former Employees [Member]
Financing Receivable, Net, Total | $				$ 46,400
Financing Receivable, Interest Rate, Stated Percentage				4.00%
Former Employee and a Consultant [Member] | Warrants in Connection with Services [Member]
Class of Warrant or Right, Issued During Period				247,000
Two Consultants [Member] | Warrants in Connection with Services [Member]
Class of Warrant or Right, Issued During Period				50,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				0.75
Class of Warrant or Right, Aggregate Purchase Price of Warrants or Rights | $				$ 2,500
Executive Vice Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $				$ 1,197
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				190,000
Executive Vice Chairman [Member] | Warrants in Connection with Services [Member]
Class of Warrant or Right, Issued During Period				670,000
Executive Vice Chairman [Member] | Warrants with Extended Expiration Dates [Member]
Class of Warrant or Right, Outstanding				23,934
Executive Vice Chairman [Member] | Stock Option Held by Employees and Consultants [Member]
Share-based Compensation, Total | $				$ 68,000
Centerpoint [Member]
Shares Held by Subsidiaries				704,309
Series B Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance			200	200	200
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.01	$ 0.01	$ 0.01
Preferred Stock, Convertible Option Per Share | $ / shares			$ 2
Preferred Stock, Dividend Rate, Percentage			2.50%
Preferred Stock, Redemption Price Per Share | $ / shares			$ 100
Convertible Preferred Stock Redemption Period			3 years
Dividends, Preferred Stock, Total | $				$ 2,000	$ 2,000
Dividends Payable | $				$ 14,000