Note 7 - Advances to Cen Biotech Ukraine (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
CEN Biotech Ukraine [Member]
Payments to Fund Long-term Loans to Related Parties	$ 350,000	$ 425,328

The cash outflow associated with extending a long-term loan to a related party. Alternate caption: Payments for Advances to Affiliates.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration