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

Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Nature of Business and Significant Accounting Policies (Details)

Note 1 - Nature of Business and Significant Accounting Policies (Details)								3 Months Ended		9 Months Ended
	Sep. 13, 2018	Jun. 27, 2018 USD ($) shares	Feb. 28, 2018 USD ($)	Dec. 04, 2017 USD ($)	Apr. 29, 2015 shares	Dec. 10, 2014 shares	Nov. 12, 2014 shares	Feb. 28, 2019 USD ($)	Feb. 28, 2018 USD ($)	Feb. 28, 2019 USD ($)	Feb. 28, 2018 USD ($)	Oct. 31, 2018 USD ($)	May 31, 2018 USD ($)	May 31, 2017 USD ($)
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio						0.625
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions			10.00%
Notes, Loans and Financing Receivable, Gross, Current												$ 5,000,000
Note Receviable, Interest Rate												6.00%
Joint Venture, Ownership Percentage	80.00%
Cash and Cash Equivalents, at Carrying Value			$ 22,733					$ 11,972,015	$ 22,733	$ 11,972,015	$ 22,733		$ 52,964	$ 78,310
Number of Reportable Segments										2
Advertising Expense								$ 381,082	$ 26,549	$ 1,134,322	$ 31,797
Reverse Merger with CLS Labs [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares) \| shares					15,000,000
Oasis Acquisition [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Payments to Acquire Businesses, Gross		$ 5,995,543
Debt Instrument, Face Amount		$ 4,000,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) \| shares		22,058,823
Liabilities Assumed		$ 204,457
Deposit [Member] \| Oasis Acquisition [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Payments to Acquire Businesses, Gross				$ 250,000
Additional Payments [Member] \| Oasis Acquisition [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Payments to Acquire Businesses, Gross			$ 1,800,000
Oasis Acquisition [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		90.00%
Original Contemplated Transaction Payment [Member] \| Oasis Acquisition [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Payments to Acquire Businesses, Gross		$ 6,200,000
Accounting Standards Update 2017-11 [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification										$ 1,265,751
Shares of CLS Holdings USA, Inc. [Member] \| CLS Labs, Inc. [Member]
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]
Subsidiary or Equity Method Investee, Cumulative Number of Shares Issued for All Transactions (in Shares) \| shares						6,250,000	10,000,000