Quarterly report pursuant to Section 13 or 15(d)

Nature of Business and Significant Accounting Policies (Details) - Schedule of Earnings Per Share, Basic and Diluted

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Nature of Business and Significant Accounting Policies (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($)
 3 Months Ended 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Schedule of Earnings Per Share, Basic and Diluted [Abstract]        
Net income (loss) attributable to CLS Holdings USA, Inc. (in Dollars) $ (345,472) $ (849,376) $ 82,127 $ (1,994,412)
Weighted average number of common shares outstanding 128,158,080 126,548,887 128,071,067 126,535,075
Dilutive effect of shares issuable 0 0 70,000 0
Diluted weighted average number of common shares outstanding 128,158,080 126,548,887 128,141,067 126,535,075
Basic earnings (loss) per share (in Dollars per share) $ 0 $ (0.01) $ 0 $ (0.02)
Diluted earnings (loss) per share (in Dollars per share) $ 0 $ (0.01) $ 0 $ (0.02)