Note 8 - Stockholders' Equity (Details Textual)				3 Months Ended		9 Months Ended			12 Months Ended
	Nov. 07, 2017 USD ($)	Feb. 10, 2015 $ / shares shares	Jul. 01, 2014 $ / shares shares	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) shares	Mar. 31, 2016 USD ($)	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) shares	Dec. 31, 2017 shares	Nov. 06, 2017 USD ($)	Dec. 31, 2016 shares	May 15, 2013
Common Stock Voting Rights Votes Per Share						1
Shares Held by Subsidiaries									704,309	704,309	704,309		704,309
Stock Issued During Period, Shares, Issued for Services						18,849
Stock Issued During Period, Value, Issued for Services | $						$ 14,631
Proceeds from the Sale of Units | $						$ 306,997	$ 249,628
Class of Warrant or Right, Issued During Period						3,460,000
Adjustments to Additional Paid in Capital, Warrant Issued | $						$ 48,350
Common Stock Conversions, Inducements | $				$ 8,000		8,000
Proceeds from Warrant Exercises | $						$ 40,001
Class of Warrant or Right, Outstanding				12,200,000		12,200,000
Weighted Average Exercise Price for Outstanding Warrants | $ / shares						$ 1.07
Weighted Average Remaining Contractual Life for Outstanding Warrants						3 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $						$ 296,852
Share-based Compensation, Total | $						$ 2,101,160	$ 481,565
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						2,647,500	294,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $							$ 1,376,250	$ 151,770
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $				$ 0		$ 0
Expired [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				322,110		322,110
Warrants Issued as Commissions [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 1		$ 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		89,485
Warrants in Connection with Services [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75		$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				917,000		917,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%		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		5,773,706
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				30,000,000		30,000,000
Allocated Share-based Compensation Expense, Total | $				$ 1,269,700	$ 6,134	$ 1,369,350	135,950
Stock Option Held by Employees and Consultants [Member]
Share-based Compensation, Total | $						$ 349,656
Subscription Agreement [Member]
Share Price | $ / shares				$ 1		$ 1
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
Proceeds from the Sale of Units | $						$ 200,497
Proceeds from Sale of Units, Net of Commissions | $						$ 185,622
Stock Issued During Period, Shares, New Issues						267,331
Class of Warrant or Right, Issued During Period						133,666
Warrant Fair Value Price Per Share | $ / shares				$ 0.05		$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $						$ 6,152
Adjustments to Additional Paid in Capital, Other | $						$ 194,345
Subscription Agreement [Member] | Restricted Stock [Member]
Number of Shares Per Unit				1		1
Subscription Agreement Two [Member]
Share Price | $ / shares				$ 0.75		$ 0.75
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.50		$ 0.50
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						213,000
Proceeds from the Sale of Units | $						$ 106,500
Stock Issued During Period, Shares, New Issues						213,000
Class of Warrant or Right, Issued During Period						106,500
Warrant Fair Value Price Per Share | $ / shares				$ 0.05		$ 0.05
Adjustments to Additional Paid in Capital, Warrant Issued | $						$ 3,140
Adjustments to Additional Paid in Capital, Other | $						$ 103,360
Subscription Agreement Two [Member] | Restricted Stock [Member]
Number of Shares Per Unit				1		1
Subscription Agreement Three [Member]
Class of Warrant or Right, Reduced Exercise Price From Previous Exercise Price of Warrants or Rights | $ / shares				$ 0.50		$ 0.50
Common Stock Conversions, Inducements | $						$ 8,000
Class of Warrant or Right, Exercised During Period						80,001
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total						80,001
Proceeds from Warrant Exercises | $						$ 40,001
Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				0.75		$ 0.75
Minimum [Member] | Expired [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				1		1
Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				3		3
Maximum [Member] | Expired [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				2.50		$ 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 Bonus [Member]
Stock Issued During Period, Value, New Issues | $									$ 100,000
Allocated Share-based Compensation Expense, Total | $						$ 22,321	$ 14,784
Employees and Consultants [Member] | Minimum [Member]
Share Price | $ / shares				0.66		$ 0.66
Employees and Consultants [Member] | Maximum [Member]
Share Price | $ / shares				0.91		0.91
Chief Executive Officer [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 1.50		$ 1.50
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $						$ 265,353
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						450,000
Chief Executive Officer [Member] | Replacement Note Held as Collateral [Member]
Convertible Notes Payable, Total | $	$ 130,000			$ 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		130,000
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		$ 88,250
Financing Receivable, Interest Rate, Stated Percentage				4.00%		4.00%
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		$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				1,765,000		1,765,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%		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		5,329,869
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
Two Former Employees [Member] | Secured Promissory Note, Consideration for Warrants Issue to Former Employees [Member]
Financing Receivable, Net, Total | $				$ 46,400		$ 46,400
Financing Receivable, Interest Rate, Stated Percentage				4.00%		4.00%
Two Former Employees [Member] | Two Former Employees Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.75		$ 0.75
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				928,000		928,000
Execution Bonus as Percentage of Exercised Options and Warrants				90.00%		90.00%
President [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 1.50
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Non-Cash Compensation Expense | $						$ 7,310
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		91,371
President [Member] | Stock Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		150,000
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		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		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		704,309
Series B Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance			200	200		200			200
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.01	$ 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 | $				$ 500		$ 1,500			$ 2,000	$ 2,000
Dividends Payable | $				$ 13,500		$ 13,500