CLS Holdings USA, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Note 15 - Subsequent Events (Details)

Note 15 - Subsequent Events (Details) - USD ($)									3 Months Ended	9 Months Ended		12 Months Ended
Note 15 - Subsequent Events (Details) - USD ($)	Apr. 06, 2018	Apr. 02, 2018	Mar. 30, 2018	Mar. 12, 2018	Mar. 02, 2018	Sep. 25, 2017	Sep. 20, 2017	Jul. 13, 2017	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017	May 31, 2017
Note 15 - Subsequent Events (Details) [Line Items]
Stock Issued During Period, Shares, Issued for Services (in Shares)								24,000
Debt Conversion, Original Debt, Amount									$ 100,000	$ 112,500	$ 250,000
Debt Conversion, Converted Instrument, Shares Issued (in Shares)									828,173			10,816,960
(in Shares)										1,480,000
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)						4,500,000	1,500,000
Debt Instrument, Convertible, Conversion Price (in Dollars per share)												$ 0.25
Subsequent Event [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)			1,413,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)			$ 0.75
Private Offering, Units (in Shares)			441,563
(in Shares)			353,250
Proceeds from Issuance of Private Placement			$ 441,563
Unit, Description			Each unit consists of four shares of common stock and a warrant to purchase one share of common stock for $0.75 per share.
Subsequent Event [Member] \| Private Placement, WesPark Offering[Member]
Note 15 - Subsequent Events (Details) [Line Items]
Warrants, Term of Warrants			5 years
(in Shares)			205,238
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)			1.25
Subsequent Event [Member] \| Oasis Note, Third Amendment [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Payment Terms		one
Subsequent Event [Member] \| Accrued Interest, CLS Co Note [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 9,308
Debt Conversion, Converted Instrument, Shares Issued (in Shares)				29,786
Subsequent Event [Member] \| Principal, Binder Note [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 464,698
Subsequent Event [Member] \| Accrued Interest, Binder Note [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 507,756
Subsequent Event [Member] \| Binder Note [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Converted Instrument, Shares Issued (in Shares)				1,624,819
Subsequent Event [Member] \| Principal, Newcan Notes [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 956,658
Subsequent Event [Member] \| Accrued Interest, Newcan notes [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 3,375,220
Subsequent Event [Member] \| Newcan Notes [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Converted Instrument, Shares Issued (in Shares)				3,375,220
Subsequent Event [Member] \| Accrued Interest, Koretsky Notes [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Conversion, Original Debt, Amount				$ 46,626
Debt Conversion, Converted Instrument, Shares Issued (in Shares)				149,203
Subsequent Event [Member] \| Starcity Capital, LLC, Consulting agreement [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Stock Issued During Period, Shares, Issued for Services (in Shares)					117,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)					412,500
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)					$ 0.75
Warrants, Term of Warrants					3 years
Subsequent Event [Member] \| Convertible Debt [Member] \| Binder Convertible Note 8 [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Convertible, Terms of Conversion Feature		The Oasis Note will be secured by a first priority security interest over the assets of each of the Oasis LLCs and Alternative Solutions, including the Company’s 10% equity interest in the Oasis LLCs, and the Company shall deliver to Alternative Solutions a confession of judgment that will become effective in the event of any event of default under the Oasis Note.Oasis currently owes certain amounts to a consultant known as 4Front Advisors, LLC. If the Company makes any payments to this company post-closing, generally speaking, the Company will be entitled to deduct the present value of such payments from the principal amount due under the Oasis Note.Assuming the Company closes on the Acquisition Agreement, in May 2020, Alternative Solutions will be entitled to a $1,000,000 payment from the Company (the “Bonus Purchase Price”) if the existing dispensary operated by an Oasis LLC has maintained an average revenue of $20,000 per day during the 2019 calendar year.The sale, assignment, transfer, pledge or other disposition of any interest in the Oasis LLCs or Alternative Solutions is ineffective unless approved in advance by the State of Nevada and any municipality in which the Oasis LLC’s operation is licensed.In connection with the Oasis Acquisition, the Company plans to employ Mr. Ben Sillitoe as its COO. The Company plans to issue him 500,000 shares of restricted common stock pursuant to his proposed employment agreement. Upon the Company’s payment of the closing consideration, it will also be obligated to issue 500,000 shares of its restricted common stock to each of David Lamadrid, its President and Chief Financial Officer, and J.P. Barton, for introducing the Company to Alternative Solutions.
Subsequent Event [Member] \| Convertible Debt [Member] \| Binder Note [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Payment Terms	No payments are required until April 1, 2019, at which time all accrued interest becomes due and payable.
Debt Instrument, Face Amount	$ 37,500.00
Debt Instrument, Convertible, Terms of Conversion Feature	Mr. Binder may, at any time prior to payment or prepayment in full, convert all principal and accrued interest thereunder, in whole or in part, into securities of the Company. For each $0.3125 converted, Mr. Binder will receive one share of the Company’s common stock.
Debt Instrument, Interest Rate, Stated Percentage	10.00%
Debt Instrument, Convertible, Conversion Price (in Dollars per share)	$ 0.3125
Subsequent Event [Member] \| Oasis Acquisition [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Payments to Acquire Businesses, Gross		$ 6,200,000
Debt Instrument, Face Amount		4,000,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned		6,000,000
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High		1,000,000
Average Revenue, Maintained		$ 20,000
Subsequent Event [Member] \| Oasis Acquisition [Member] \| Additional Interest to be Acquired [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		90.00%
Subsequent Event [Member] \| Oasis Acquisition [Member] \| Convertible Debt [Member] \| Newcan Convertible Note 6 [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Cash to be Raised to Close Transaction		$ 8,000,000
Subsequent Event [Member] \| Oasis Acquisition [Member] \| Chief Operating Officer [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)		500,000
Subsequent Event [Member] \| Oasis Acquisition [Member] \| President and Chief Financial Officer [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)		500,000