Note 10 - Loans Payable - Related Party - Loans Payable to Related Parties (Details) (Parentheticals)	12 Months Ended
Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2021 CAD ($) shares	Dec. 31, 2020 CAD ($) shares
Joseph Byrne [Member]
Related Party Interest	5.00%		5.00%
Loans Payable to Related Party [Member] \| Mr. Chaaban's Spouse [Member]
Interest Rate	12.00%		12.00%
Maturity Date	Aug. 17, 2020
Loans Payable to Related Party [Member] \| Creative Edge [Member]
Interest Rate	10.00%	10.00%	10.00%	10.00%
Maturity Date	Dec. 31, 2018	Dec. 31, 2018
Loans Payable to Related Party [Member] \| R&D Labs Canada, Inc [Member]
Interest Rate	8.00%	8.00%	8.00%	8.00%
Maturity Date	Oct. 02, 2019	Oct. 02, 2019
Loans Payable to Related Party [Member] \| Bill Chaaban, President of Cen Biotech [Member]
Interest Rate	10.00%	10.00%	10.00%	10.00%
Maturity Date	Dec. 31, 2018	Dec. 31, 2018
Original Amount	$ 198,660	$ 198,660	$ 48,630	$ 48,630
Loans Payable to Related Party [Member] \| Spouse of Joseph Byrne, CEO of CEN Biotech [Member]
Maturity Date	Apr. 16, 2022	Apr. 16, 2022
Share Interest (in shares)	4,000	4,000	4,000	4,000
Related Party Interest	5.00%	5.00%	5.00%	5.00%
Loans Payable to Related Party [Member] \| Director, Alex Tarrabain [Member]
Maturity Date	Apr. 16, 2022	Apr. 16, 2022
Share Interest (in shares)	3,000	3,000	3,000	3,000
Loans Payable to Related Party [Member] \| Joseph Byrne [Member]
Share Interest (in shares)		2,000		2,000
Related Party Interest		5.00%		5.00%

Contractual share interest, per 30-day period, for funds borrowed under the debt agreement.

No definition available.

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- Definition

The percentage of a related party's equity interest owned of the company.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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