Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)				1 Months Ended	3 Months Ended			9 Months Ended		162 Months Ended
	Feb. 16, 2018	Aug. 11, 2017	Jun. 01, 2017	Dec. 31, 2016	Feb. 28, 2018	Nov. 30, 2017	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	May 31, 2017	May 01, 2017
Net Income (Loss) Attributable to Parent					$ (2,442,183)		$ (271,550)	$ (9,147,371)	$ (1,067,676)	$ (55,000,000)
Cost of Goods and Services Sold						$ 900,000
Cash Equivalents, at Carrying Value					$ 0			$ 0		0	$ 0
Stock Issued During Period, Shares, Issued for Services	150,000	200,000	160,000	50,000	210,000			1,220,000
Stock Issued During Period, Value, Issued for Services				$ 55,000	$ 192,445			$ 954,775
Retained Earnings (Accumulated Deficit)					(55,326,517)			(55,326,517)		$ (55,326,517)	(46,179,146)
Employee Stock Option [Member] | Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense, Net of Tax					$ 244,060		$ 0	732,180	$ 0
Prepaid Expenses and Other Current Assets [Member]
Allocated Share-based Compensation Expense, Net of Tax								$ 413,455
Restatement Adjustment [Member]
Accounts Payable and Accrued Liabilities											(369,399)
Retained Earnings (Accumulated Deficit)											369,399
SolBright Renewable Energy, LLC [Member]
Business Combination Recognized Identifiable Assets Acquired and Liabilities, Assumed Current Liabilities, Accounts Payable and Accrued Liabilities											$ 369,399	$ 635,832