Note 6 - Loans Payable - Related Party - Loans Payable to Related Parties (Details) (Parentheticals) - Loans Payable to Related Party [Member]	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Mar. 31, 2022 CAD ($) shares	Dec. 31, 2021 CAD ($) shares
Mr. Chaaban [Member]
Interest Rate	12.00%	12.00%	12.00%	12.00%
Maturity date	Aug. 17, 2020	Aug. 17, 2020
Creative Edge [Member]
Interest Rate	10.00%	10.00%	10.00%	10.00%
Maturity date	Dec. 31, 2018	Dec. 31, 2018
R&D Labs Canada, Inc [Member]
Interest Rate	8.00%	8.00%	8.00%	8.00%
Maturity date	Oct. 02, 2019	Oct. 02, 2019
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
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%
Director, Alex Tarrabain [Member]
Maturity date	Apr. 16, 2022	Apr. 16, 2022
Share Interest (in shares)	3,000	3,000	3,000	3,000

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.

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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.

+ References

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