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Area of land held.

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Note 12 - Related Party Transactions (Details Textual)		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended	13 Months Ended
Note 12 - Related Party Transactions (Details Textual)	Oct. 01, 2017 CAD ($)	Sep. 30, 2022 CAD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2017 USD ($)	Jan. 31, 2018 CAD ($)	Mar. 31, 2020 a	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 14, 2017	Dec. 02, 2017	Jul. 12, 2017
Area of Land (Acre) \| a									10.4
Operating Lease, Right-of-Use Asset			$ 195,703		$ 195,703					$ 229,284
Operating Lease, Liability, Total			197,184		197,184
Lease Arrangement, 20 North Rear Road [Member]
Operating Lease, Monthly Rent								$ 4,000
Lessee, Operating Lease, Term of Contract (Year)								5 years
Operating Lease, Right-of-Use Asset			49,963		49,963						$ 68,547
Operating Lease, Liability, Total			$ 47,028		$ 47,028						$ 65,467
Lessee, Operating Lease, Discount Rate			8.00%		8.00%					8.00%
Operating Lease, Expense			$ 8,690	$ 9,106	$ 17,409	$ 15,092
Leases Office Space from R&D Labs Canada, Inc [Member]
Operating Lease, Monthly Rent	$ 2,608	$ 3,390
Operating Lease, Right-of-Use Asset			145,740		145,740					$ 160,737
Operating Lease, Liability, Total			$ 150,156		$ 150,156					$ 163,157
Lessee, Operating Lease, Discount Rate			8.00%		8.00%					8.00%
Operating Lease, Expense			$ 6,928	7,060	$ 13,253	12,039
Former CEO [Member]
Ownership Percentage			5.00%		5.00%
Long-term Convertible Notes Payable to Multiple Private Investors [Member]
Debt Instrument, Interest Rate, Stated Percentage														5.00%
CEN Biotech Ukraine [Member] \| XN Pharma [Member]
Ownership Percentage			49.00%		49.00%							49.00%
CEN Biotech Ukraine [Member]
Percentage of Related Party's Equity Interest Owned by Director												25.50%
Business Acquisition, Percentage of Voting Interests Acquired												51.00%
CEN Biotech Ukraine [Member]
Due from Related Parties, Total			$ 1,065,328		$ 1,065,328					$ 1,065,328
Percentage of Related Party's Equity Interest Owned by Director													51.00%
CEN Biotech Ukraine [Member] \| Equipment Sold to Related Party in Exchange for Note Receivable [Member]
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings							$ 255,141
Notes Receivable, Related Parties							44,859
Joseph Byrne [Member]
Related Party Transaction, Due from (to) Related Party, Current, Total			(8,347)		(8,347)
Board Members and Officers [Member] \| Consulting Fees [Member]
Related Party Transaction, Amounts of Transaction			31,200	$ 33,800	62,400	$ 65,000
Due to Related Parties, Total			$ 267,800		$ 267,800					$ 263,900
R&D Labs Canada, Inc [Member] \| Purchased Equipment in Exchange for Note Payable [Member]
Notes Payable, Related Parties							$ 300,000