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

Quarterly report pursuant to Section 13 or 15(d)

Acquisition of Alternative Solutions (Details)

Acquisition of Alternative Solutions (Details) - Oasis Acquisition [Member]							3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 16, 2021 USD ($)	May 27, 2020 USD ($)	Aug. 14, 2019 USD ($)	Jun. 27, 2018 USD ($) shares	Feb. 28, 2018 USD ($)	Dec. 04, 2017 USD ($)	Feb. 28, 2021 USD ($)	Feb. 29, 2020 USD ($)	Feb. 28, 2021 USD ($)	Feb. 29, 2020 USD ($)	May 31, 2020 USD ($) $ / shares	May 31, 2019 USD ($)	May 31, 2018 USD ($)
Acquisition of Alternative Solutions (Details) [Line Items]
Number of Subsidiaries						3
Payments to Acquire Businesses, Gross				$ 2,050,000	$ 6,200,000
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions					10.00%
Liabilities Assumed				$ 204,457	$ 204,457
Repayments of Notes Payable			$ 2,500,000
Debt Instrument, Increase (Decrease), Other, Net			$ (138,784)
Business Acquisition, Equity Interest Issued or Issuable, Description				The number of Purchase Price Shares was equal to 80% of the offering price of the Company’s common stock in its last equity offering, which price was $0.34 per share.
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High				$ 1,000,000
Average Revenue, Maintained				20,000
Business Combination, Contingent Consideration, Liability												$ 1,000,000	$ 678,111
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 106,195											321,889
Payment for Contingent Consideration Liability, Operating Activities		$ 850,000
Escrow Deposit		$ 150,000
Business Combination, Consideration Transferred				27,975,650
Goodwill, Impairment Loss											$ 25,185,003
Goodwill				25,742,899							$ 557,896	$ 25,742,899
Share Price (in Dollars per share) \| $ / shares											$ 0.06
Revenues							$ 4,554,082	$ 3,224,170	$ 13,232,840	$ 9,139,616
Oasis LLCs [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Payments to Acquire Businesses, Gross				$ 5,995,543
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				90.00%
Debt Instrument, Face Amount				$ 4,000,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) \| shares				22,058,823
Deposit [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Payments to Acquire Businesses, Gross						$ 250,000
Additional Payments [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Payments to Acquire Businesses, Gross					$ 1,800,000	$ 1,800,000
Taxes Paid by the Company [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	41,805
Other Expense [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 2,000
Original Contemplated Transaction Payment [Member] \| Oasis LLCs [Member]
Acquisition of Alternative Solutions (Details) [Line Items]
Payments to Acquire Businesses, Gross				$ 6,200,000