Note 9 - Capital Transactions (Details) - USD ($) | Apr. 27, 2014 | Sep. 30, 2016 | May 15, 2014 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | Feb. 29, 2016 | Jun. 08, 2015 | May 15, 2015 | Apr. 30, 2015 | Apr. 22, 2015 |
Issuance of stock for debt conversion, shares | | | | | | 2,219,750 | | | | | | |
Debt Conversion Price | | | | $ 0.30 | | $ 0.30 | | | | | | |
Debt Conversion, Original Debt, Amount | | | | | $ 900,000 | | | | | | | |
Loss on debt conversion | | | | | $ 248,858 | $ 0 | | | | | | |
Discounting of Warrants | | | | | In order to encourage the exercise of the 15,512,500 warrants issued to investors in private offering dated December 2, 2015 and the 15,000,000 warrants issued to investors in private offering dated August 26, 2016, the Company effected a temporary decrease, until March 31, 2017, in the exercise price of the warrants from $0.50 and $0.60, respectfully, to $0.20 per share. | | | | | | | |
Class of Warrant or Right, Outstanding | | | | | 25,606,171 | | | | | | | |
Proceeds from Warrant Exercises | | | | | $ 4,600,000 | | | | | | | |
Induced dividend | | | | | $ 4,600,000 | | | | | | | |
Issuance of common stock to settle payables, shares | | | | | 1,600,000 | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 1,300,000 | 1,000,000 | | | | | | |
Stock Issued During Period, Shares, Settlement | | | | | 1,600,000 | | | | | | | |
Issuance of common stock to settle payables, value | | | | | $ 640,962 | | | | | | | |
Issuance of stock for cash, shares | | | | | 29,872,500 | | | | | | | |
Proceeds from issuance of common stock and warrants | | | | | $ 9,749,465 | 1,479,688 | | | | | | |
Issuance of stock for cash, value | | | | | $ 4,626,071 | $ 100,000 | | | | | | |
Exercises of stock options, shares | | | | | 0 | (100,000) | | | | | | |
GB Puerto Rico | | | | | | | | | | | | |
Share Price | | | | | | | | | | | | $ 0.21 |
Issuance of stock for cash, shares | | | | | 2,820,000 | | | | | | | |
Issuance of stock for cash, value | | | | | $ 600,000 | | | | | | | |
Class B Warrant | | | | | | | | | | | | |
Proceeds from Warrant Exercises | | | | | $ 400,000 | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | | | | | | | $ 0.20 | $ 0.20 | |
Placement Agent | | | | | | | | | | | | |
Exercises of stock options, shares | | | | | | | 1,000,000 | | | | | |
Private Placement 1 | | | | | | | | | | | | |
Issuance of stock for cash, shares | | | | | 14,847,500 | | | | | | | |
Shares Issued, Price Per Share | | | | | $ 0.20 | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | | $ 0.50 | | | | | | | |
Private Placement 2 | | | | | | | | | | | | |
Issuance of stock for cash, shares | | | | | 15,000,000 | | | | | | | |
Shares Issued, Price Per Share | | | | | $ 0.20 | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | | $ 0.60 | | | | | | | |
Investor | | | | | | | | | | | | |
Share Price | | | | | | | | | | | | $ 0.21 |
Issuance of stock for cash, value | | | | | $ 400,000 | | | | | | | |
Convertible Promissory Note | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Amount | | | | | $ 300,000 | | | | | | | |
Short Term Promissory Note 1 | | | | | | | | | | | | |
Debt Conversion Price | | | | | $ 0.20 | | | | | | | |
Initial debt amount | | | | | $ 192,500 | | | $ 192,500 | | | | |
Debt Conversion, Converted Instrument, Amount | | | | | $ 192,500 | | | | | | | |
Short Term Promissory Note 2 | | | | | | | | | | | | |
Debt Conversion Price | | | | | $ 0.20 | | | | | | | |
Initial debt amount | | | | $ 300,000 | $ 300,000 | $ 300,000 | | | | | | |
Investment Warrants, Exercise Price | | | | | $ 0.50 | | | | | | | |
Loss on debt conversion | | | | | $ 100,000 | | | | | | | |
Short Term Promissory Note 3 | | | | | | | | | | | | |
Debt Conversion Price | | | | | $ 0.20 | | | | | | | |
Initial debt amount | | | | | $ 500,000 | | | | | | | |
Loss on debt conversion | | | | | 200,000 | | | | | | | |
Short Term Promissory Note 3 | Principal | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Amount | | | | | 500,000 | | | | | | | |
Short Term Promissory Note 3 | Interest | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Amount | | | | | $ 38,333 | | | | | | | |
Pacific Leaf Ventures Lp | | | | | | | | | | | | |
Issuance of stock for debt conversion, shares | | | | | 10,759,332 | | | | | | | |
Debt Conversion Price | | | | | $ 0.25 | | | | $ 0.50 | | | |
Debt Conversion, Original Debt, Amount | | | | | $ 2,689,835 | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | 6.00% | | | |
Initial debt amount | | | | | | | | | $ 1,750,000 | | | |
Investment Warrants, Exercise Price | | | | | $ 0.36 | | | | | | | |
Class of Warrant or Right, Outstanding | | | | | 1,500,000 | | | | | | | |
Second Amendment Features | | eliminates Pacific Leaf's option to purchase up to a 20% membership interest in GBSN and reduces Pacific Leaf's existing royalty rate to 16.4% of the gross sales revenue of GBSN. It also caps maximum aggregate royalty payments to be made to Pacific Leaf at $2,420,000 with respect to any calendar year. | | | | | | | | | | |
Pacific Leaf Ventures Lp | Second Amendment | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | | 1,500,000 | | | | | | | | | | |
Allocated Share-based Compensation Expense | | $ 900,000 | | | | | | | | | | |
Pacific Leaf Ventures Lp | Convertible Promissory Note | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | 6.00% | | | | | | | |
A creditor | | | | | | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 600,000 | | | | | | | |
Issuance of stock for cash, shares | | | | | 1,991,943 | | | | | | | |
A creditor | Short Term Promissory Note 1 | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Amount | | | | | $ 962,500 | | | | | | | |
An independent party | Private Placement 2 | | | | | | | | | | | | |
Issuance of stock for cash, shares | | | | | 25,000 | | | | | | | |
Shares Issued, Price Per Share | | | | | $ 0.51 | | | | | | | |
Proceeds from issuance of common stock and warrants | | | | | $ 5,100,000 | | | | | | | |
A third-party brokerage firm | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Warrants or Options Issued | | | | | 3,412,500 | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 1,300,000 | | | | | | | |
Compensation Warrants, shares | | | | | 58,247 | | | | | | | |
Consultants | | | | | | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 500,000 | | | | | | | |
Issuance of stock for cash, shares | | | | | 916,300 | | | | | | | |
Employees | | | | | | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 100,000 | $ 600,000 | | | | | | |
Issuance of stock for cash, shares | | | | | 266,345 | | | | | | | |
Compensation Warrants, shares | | | | | | 714,400 | | | | | | |
Investor 1 | | | | | | | | | | | | |
Issuance of stock for cash, shares | | | | | 333,333 | | | | | | | |
Shares Issued, Price Per Share | | | | | $ 0.30 | | | | | | | |
Proceeds from issuance of common stock and warrants | | | | | $ 100,000 | | | | | | | |
Common Stock | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued | | | | | 15,760,165 | 3,387,750 | | | | | | |
Issuance of stock for debt conversion, shares | | | | | 15,760,165 | 2,219,750 | | | | | | |
Issuance of common stock to settle payables, shares | | | | | 1,991,943 | | | | | | | |
Share Price | | | | $ 0.20 | | $ 0.20 | | | | | | |
Allocated Share-based Compensation Expense | | | | | | $ 1,000,000 | | | | | | |
Stock Issued During Period, Shares, Settlement | | | | | 1,991,943 | | | | | | | |
Issuance of common stock to settle payables, value | | | | | $ 199 | | | | | | | |
Issuance of stock for cash, shares | | | | 665,000 | 29,872,500 | 333,333 | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | $ 0.50 | | $ 0.50 | | | | | | |
Compensation Warrants, shares | | | | | 58,247 | | | | | | | |
Cancelation of restricted stock, shares | | | | | | (2,292,400) | | | | | | |
Exercise of warrants for stock, shares | | | | | $ 25,606,171 | $ 9,119,135 | | | | | | |
Issuance of stock for cash, value | | | | | 2,987 | $ 33 | | | | | | |
Exercises of stock options, shares | | | | | | 100,000 | | | | | | |
Common Stock | Class B Warrant | | | | | | | | | | | | |
Exercise of warrants for stock, shares | | | | | $ 2,192,112 | | | | | | | |
Common Stock | Chief Financial Officer | | | | | | | | | | | | |
Issuance of common stock to settle payables, shares | | | | | 200,000 | | | | | | | |
Stock Issued During Period, Shares, Settlement | | | | | 200,000 | | | | | | | |
Common Stock | Investor | | | | | | | | | | | | |
Issuance of stock for cash, shares | | | | | 476,190 | | | | | | | |
Common Stock | Amended Counter claim | | | | | | | | | | | | |
Issuance of common stock to settle payables, shares | | | | | 1,400,000 | | | | | | | |
Stock Issued During Period, Shares, Settlement | | | | | 1,400,000 | | | | | | | |
Issuance of common stock to settle payables, value | | | | | $ 400,000 | | | | | | | |
Common Stock | Short Term Promissory Note 1 | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued | | | | | 965,500 | | | | | | | |
Issuance of stock for debt conversion, shares | | | | | 5,000,833 | | | | | | | |
Common Stock | Short Term Promissory Note 2 | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued | | | | | 1,500,000 | | | | | | | |
Debt Conversion, Converted Instrument, Warrants or Options Issued | | | | | 1,500,000 | | | | | | | |
Common Stock | Short Term Promissory Note 3 | | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued | | | | | 2,538,333 | | | | | | | |
Common Stock | Employment Termination | | | | | | | | | | | | |
Cancelation of restricted stock, shares | | | | | | 1,500,000 | | | | | | |
Common Stock | Erroneous Issuance | | | | | | | | | | | | |
Cancelation of restricted stock, shares | | | | | | 292,400 | | | | | | |
Common Stock | Erroneous Issuance Under Employment Agreement | | | | | | | | | | | | |
Cancelation of restricted stock, shares | | | | | | 100,000 | | | | | | |
Common Stock | Shares Subject To Forfeiture | | | | | | | | | | | | |
Cancelation of restricted stock, shares | | | | | | 400,000 | | | | | | |
Common Stock | Pacific Leaf Ventures Lp | | | | | | | | | | | | |
Issuance of common stock to settle payables, shares | | | | | 1,000,000 | | | | | | | |
Stock Issued During Period, Shares, Settlement | | | | | 1,000,000 | | | | | | | |
Common Stock | Pacific Leaf Ventures Lp | Second Amendment | | | | | | | | | | | | |
Issuance of common stock to settle payables, shares | | 1,000,000 | | | | | | | | | | |
Share Price | | $ 0.36 | | | | | | | | | | |
Stock Issued During Period, Shares, Settlement | | 1,000,000 | | | | | | | | | | |
Warrant | | | | | | | | | | | | |
Stock Repurchased During Period, Shares | 4,000,000 | | 1,600,000 | | | | | | | | | |
Stock Repurchased During Period, Value | $ 56,000 | | | | | | | | | | | |
Warrant | Short Term Promissory Note 1 | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | | $ 0.50 | | | | | | | |
Warrant | Short Term Promissory Note 2 | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | | | | | $ 0.50 | | | | | | | |
Warrant | Pacific Leaf Ventures Lp | | | | | | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 900,000 | | | | | | | |
Warrant | A third-party brokerage firm | | | | | | | | | | | | |
Allocated Share-based Compensation Expense | | | | | $ 20,000 | | | | | | | |