Note 8 - Stockholders' Equity (Details Textual)																																	1 Months Ended			2 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2018 USD ($) $ / shares shares	Mar. 26, 2018 USD ($) shares	Feb. 16, 2018 $ / shares shares	Feb. 02, 2018 $ / shares shares	Jan. 18, 2018 $ / shares shares	Jan. 11, 2018 $ / shares shares	Dec. 27, 2017 USD ($) $ / shares shares	Dec. 21, 2017 $ / shares shares	Dec. 04, 2017 USD ($) $ / shares shares	Nov. 29, 2017 USD ($) shares	Nov. 27, 2017 USD ($) $ / shares shares	Sep. 28, 2017 USD ($) $ / shares shares	Aug. 29, 2017 $ / shares shares	Aug. 11, 2017 $ / shares shares	Jun. 01, 2017 $ / shares shares	May 31, 2017 USD ($) $ / shares shares	May 22, 2017 USD ($) shares	May 16, 2017 $ / shares shares	May 11, 2017 USD ($) shares	May 01, 2017 USD ($) $ / shares shares	Mar. 31, 2017 $ / shares shares	Mar. 23, 2017 shares	Mar. 07, 2017 USD ($) $ / shares shares	Mar. 03, 2017 USD ($) $ / shares shares	Mar. 01, 2017 USD ($) $ / shares shares	Feb. 15, 2017 USD ($) shares	Dec. 13, 2016 shares	Nov. 11, 2016 shares	Oct. 28, 2016 shares	Oct. 13, 2016 USD ($) $ / shares shares	Sep. 15, 2016 shares	Mar. 18, 2015	Nov. 30, 2017 shares	Jan. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	May 31, 2018 USD ($) $ / shares shares	May 31, 2017 USD ($) $ / shares shares	Mar. 31, 2018 $ / shares shares	Feb. 28, 2018 USD ($)	May 31, 2018 USD ($) $ / shares shares	May 31, 2017 USD ($) $ / shares shares	Mar. 14, 2018 $ / shares	Aug. 28, 2017 $ / shares	Apr. 28, 2017 $ / shares	Apr. 27, 2017 USD ($) shares	Aug. 31, 2016 USD ($)	Mar. 17, 2014 shares	Mar. 16, 2014 shares
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.0001															$ 0.0001																				$ 0.0001	$ 0.0001			$ 0.0001	$ 0.0001			$ 0.001
Preferred Stock, Shares Authorized	5,000,000															5,000,000																				5,000,000	5,000,000			5,000,000	5,000,000
Preferred Stock, Shares Outstanding, Ending Balance	0															0																				0	0			0	0
Preferred Stock, Shares Issued, Total	0																																			0				0
Purchase of Preferred Stock from Related Party, Value, Equity Impact | $																																								$ (100)
Common Stock, Shares Authorized	600,000,000															600,000,000																				600,000,000	600,000,000			600,000,000	600,000,000						600,000,000	100,000,000
Stock Issued During Period, Shares, Issued for Services		1,000,000	150,000											200,000	160,000												50,000				200,000				50,000					1,220,000	610,000
Shares Issued, Price Per Share | $ / shares			$ 88,500	$ 18,600
Stock Issued During Period, Value, Issued for Services | $		$ 439,550																																	$ 55,000					$ 954,775	$ 511,300
Stock Issued During Period, Value, New Issues | $																																									$ 1,230,002
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																																									175,000
Proceeds from Issuance of Common Stock | $																																									$ 1,230,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.15																																			$ 1.15				$ 1.15
Stock Issued During Period, Value, Acquisitions | $																																									5,120,000
Class of Warrant or Right Exercised in Period																																	3,182,162
Stock Issued During Period, Shares, Conversion of Convertible Securities				30,000						60,606
Stock Issued During Period, Value, Conversion of Convertible Securities | $										$ 15,000																														$ 40,000	169,329
Share Price | $ / shares														$ 124,000	$ 112,000																											$ 0.578
Stock Issued During Period, Shares, Warrants Exercise																																	2,370,318
Gain (Loss) on Extinguishment of Debt, Total | $											$ (101,223)																													$ 86,258	$ (145,580)
Stock Issued During Period, Shares, Payment Forbearance						102,664
Stock Issued During Period, Shares, Settlement of Debt	231,458																																							231,458
Stock Issued During Period, Value, Settlement of Debt | $	$ 277,750																																							$ 277,750
Gain on Debt Settled With Stock Issuance | $	$ 187,481																																							187,481
Settlement of Debt With Related Party, Value, Equity Impact | $																																								$ 2,225,480
Minimum [Member]
Class of Warrant or Right, Term																																								3 years
Maximum [Member]
Class of Warrant or Right, Term																																								5 years
Law Firm [Member]
Stock Issued During Period, Shares, Issued for Services																				100,000
Stock Issued During Period, Value, Issued for Services | $																				$ 128,000
The 10% Secured Convertible Promissory Notes [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																				2,500,000
Warrants Issued in Connection with AIP Financing [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights													2,500,000
Class of Warrant or Right, Term																				5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares													$ 0.60							$ 1																							$ 0.80
Employee [Member]
Stock Issued During Period, Shares, New Issues					310,000
Shares Issued, Price Per Share | $ / shares					$ 179,800
SES President [Member]
Settlement of Debt with Related Party, Shares, Equity Impact	5,000
Settlement of Debt with Related Party, Fair Value of Shares Issued | $	$ 1,950
Settlement of Debt With Related Party, Value, Equity Impact | $	$ 2,225,479
AIP Note Purchase Agreement [Member]
Stock Issued During Period, Shares, Issued for Monetary Penalty													150,001
AIP [Member]
Shares Issued, Price Per Share | $ / shares								$ 650,000
Stock Issued During Period, Shares, For Extending Date to File Registration Statement								1,000,000
LS and SBI [Member]
Stock Issued During Period, Shares, Issued for Extending Debt																																						400,000
Debt Instrument, Convertible, Number of Shares of Common Stock Exchanged for Extension of Debt Instrument Maturity Date																																				1,100,000
Debt Instrument, Convertible, Value of Common Stock Exchanged for Extension of Debt Instrument Maturity Date | $																																				$ 435,000
LS and SBI [Member] | Minimum [Member]
Shares Issued, Price Per Share | $ / shares																																						$ 0.60
LS and SBI [Member] | Maximum [Member]
Shares Issued, Price Per Share | $ / shares																																						$ 0.87
Convertible Promissory Note [Member]
Shares Issued, Price Per Share | $ / shares						$ 56,465
Debt Instrument, Interest Rate, Stated Percentage																								10.00%
Debt Instrument, Face Amount | $																								$ 103,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																								50,000
Class of Warrant or Right, Term																								3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares																								$ 0.60
The 10% Secured Convertible Promissory Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage																				10.00%
Debt Instrument, Face Amount | $																				$ 2,500,000
The 9% Convertible Promissory Notes [Member] | Private Placement [Member]
Debt Instrument, Interest Rate, Stated Percentage																																													9.00%
Debt Instrument, Face Amount | $																																													$ 899,999
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																																													1,279,998
10% Promissory Note Due March 31, 2017 [Member]
Conversion of Stock, Shares Converted																169,886
Debt Instrument, Interest Rate, Stated Percentage																					6.00%		10.00%		10.00%																					10.00%
Debt Instrument, Face Amount | $																							$ 100,000		$ 100,000																					$ 150,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights													25,000								100,000		100,000		100,000
Class of Warrant or Right, Term													3 years								3 years		3 years		3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares													$ 1					$ 0.60			$ 1		$ 0.60		$ 0.60
Class of Warrant or Right Exercised in Period																		831,168
Two Consulting Firms [Member]
Stock Issued During Period, Shares, Issued for Services																														400,000
Shares Issued, Price Per Share | $ / shares																														$ 0.67
Stock Issued During Period, Value, Issued for Services | $																														$ 268,000
Two Noteholders [Member]
Stock Issued During Period, Shares, New Issues											400,000
Stock Issued During Period, Value, New Issues | $											$ 348,000
Three Consultants [Member]
Stock Issued During Period, Shares, Issued for Services											550,000
Stock Issued During Period, Value, Issued for Services | $											$ 526,000
Three Consultants [Member] | Minimum [Member]
Shares Issued, Price Per Share | $ / shares											$ 0.65
Three Consultants [Member] | Maximum [Member]
Shares Issued, Price Per Share | $ / shares											$ 1.30
Vendor [Member]
Stock Issued During Period, Shares, Settlement of Accounts Payable											337,410
Settlement of Accounts Payable | $											$ 202,446
L2 [Member]
Stock Issued During Period, Shares, Conversion of Convertible Securities									101,010
L2 [Member] | The 9% Convertible Promissory Notes [Member]
Shares Issued, Price Per Share | $ / shares									$ 0.87
Stock Issued During Period, Value, Conversion of Convertible Securities | $									$ 25,000
Stock Issued During Period, Shares, Issued for Extending Debt									200,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio																																30
Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues
Settlement of Debt with Related Party, Shares, Equity Impact
Purchase of Preferred Stock from Related Party, Value, Equity Impact | $
Stock Issued During Period, Shares, Issued for Services
Stock Issued During Period, Value, Issued for Services | $
Stock Issued During Period, Value, New Issues | $
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Stock Issued During Period, Shares, Acquisitions
Stock Issued During Period, Value, Acquisitions | $
Stock Issued During Period, Shares, Conversion of Convertible Securities
Stock Issued During Period, Value, Conversion of Convertible Securities | $
Settlement of Debt With Related Party, Value, Equity Impact | $
Common Stock [Member]
Stock Issued During Period, Shares, New Issues																			50,000																						2,050,002
Settlement of Debt with Related Party, Shares, Equity Impact																																								5,000
Purchase of Preferred Stock from Related Party, Value, Equity Impact | $
Stock Issued During Period, Shares, Issued for Services																																								1,220,000	610,000
Stock Issued During Period, Value, Issued for Services | $																																								$ 122	$ 61
Stock Issued During Period, Value, New Issues | $																																									$ 205
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																																									44,403
Stock Issued During Period, Shares, Acquisitions																																									4,000,000
Stock Issued During Period, Value, Acquisitions | $																																									$ 400
Cashless Exercise of Warrants in Shares																		447,552
Stock Issued During Period, Shares, Conversion of Convertible Securities																																					104,796			161,616	219,886
Stock Issued During Period, Value, Conversion of Convertible Securities | $																																								$ 16	$ 22
Settlement of Debt With Related Party, Value, Equity Impact | $																																								$ 1
Common Stock [Member] | Interest Expense [Member]
Stock Issued During Period, Values, Inducement | $																			$ 62,500
Stock Issued During Period, Value, Conversion of Convertible Securities | $																																					$ 79,454
Common Stock [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																						44,403
Common Stock [Member] | Noteholder [Member]
Stock Issued During Period, Shares, Inducement																																		15,000
Stock Issued During Period, Values, Inducement | $																																		$ 14,398
Common Stock [Member] | Investor [Member]
Stock Issued During Period, Shares, Inducement																																		20,000
Stock Issued During Period, Values, Inducement | $																																		$ 14,400
Common Stock [Member] | Convertible Promissory Note [Member]
Stock Issued During Period, Shares, New Issues																												50,000	20,000
Debt Instrument, Face Amount | $																$ 77,000			$ 150,000																		77,000				77,000
Common Stock [Member] | Two Vendors [Member]
Stock Issued During Period, Shares, New Issues																										208,596
Stock Issued During Period, Value, New Issues | $																										$ 253,003
Common Stock [Member] | Accredited Investors [Member] | Private Placement [Member]
Stock Issued During Period, Shares, Issued for Services																				2,050,002
Proceeds from Issuance of Common Stock | $																				$ 1,230,000
Common Stock [Member] | Accredited Investors [Member] | 10% Promissory Note Due March 31, 2017 [Member]
Conversion of Stock, Shares Converted																				169,886
Common Stock [Member] | Consultant [Member]
Stock Issued During Period, Shares, Issued for Services																	60,000
Stock Issued During Period, Value, Issued for Services | $																	$ 60,300
Warrant [Member]
Class of Warrant or Right Exercised in Period																		831,168
Warrant [Member] | Accredited Investors [Member] | Private Placement [Member]
Debt Instrument, Face Amount | $																				$ 100,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																				2,050,002
Class of Warrant or Right, Term																				3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares																				$ 1
Warrant [Member] | Accredited Investors [Member] | 10% Promissory Note Due March 31, 2017 [Member]
Conversion of Stock, Shares Converted																				169,886
The 4% Series A Convertible Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage																																								4.00%
Dividends, Total | $																																								$ 260,000
Convertible Preferred Stock, Stated Value | $ / shares																																								$ 1.50
Preferred Stock, Liquidation Preference Per Share | $ / shares	$ 1.50																																			$ 1.50				$ 1.50
Series A Preferred Stock [Member] | Preferred Stock [Member]
Settlement of Debt with Related Party, Shares, Equity Impact	4,000,000
Purchase of Preferred Stock from Related Party, Value, Equity Impact | $	$ (100)
AIP Note Purchase Agreement [Member]
Conversion of Stock, Shares Converted													150,001
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares													$ 0.60
Other Noncash Expense | $																																							$ 594,583	$ 594,583
AIP Note Purchase Agreement [Member] | The 10% Secured Convertible Promissory Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage																				10.00%
Debt Instrument, Face Amount | $																				$ 2,500,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																				2,500,000
Class of Warrant or Right, Term																				5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares																				$ 1
Consulting Agreement [Member] | Consultant [Member]
Stock Issued During Period, Shares, Issued for Services							25,000
Shares Issued, Price Per Share | $ / shares							$ 16,250
Stock Issued During Period, Value, Issued for Services | $							$ 15,000
Consulting Agreement [Member] | Governance Box, Inc [Member]
Stock Issued During Period, Shares, Issued for Services						160,000
Shares Issued, Price Per Share | $ / shares						$ 104,000
SolBright Renewable Energy, LLC [Member] | Convertible Promissory Note [Member]
Debt Instrument, Face Amount | $																$ 6,000,000																					$ 6,000,000				$ 6,000,000
SolBright Renewable Energy, LLC [Member] | Common Stock [Member]
Stock Issued During Period, Shares, Acquisitions																				4,000,000
Stock Issued During Period, Value, Acquisitions | $																				$ 5,120,000
SolBright Renewable Energy, LLC [Member] | The 4% Series A Convertible Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share | $ / shares																				$ 0.0001
Debt Instrument, Interest Rate, Stated Percentage																				4.00%
SolBright Renewable Energy, LLC [Member] | Asset Purchase Agreement [Member] | Common Stock [Member]
Shares Issued, Price Per Share | $ / shares																				$ 1.28
Business Acquisition, Anti Dilution Protection, Value of Stock Issued | $																				$ 4,000,000
SolBright Renewable Energy, LLC [Member] | Asset Purchase Agreement [Member] | The 4% Series A Convertible Preferred Stock [Member]
Conversion of Stock, Shares Converted												4,000,000
SolBright Renewable Energy, LLC [Member] | Asset Purchase Agreement [Member] | Common Stock Consideration [Member]
Stock Issued During Period, Shares, New Issues																				4,000,000
Business Acquisition, Anti Dilution Protection, Value of Stock Issued | $																				$ 4,000,000
SolBright Renewable Energy, LLC [Member] | Asset Purchase Agreement [Member] | Common Stock Consideration [Member] | The 4% Series A Convertible Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share | $ / shares												$ 0.0001
Preferred Stock, Shares Authorized												5,000,000
Aggregate Indebtedness, Total | $												$ 6,000,000