Note 12 - Related Party Transactions (Details Textual) - USD ($)	9 Months Ended	12 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Advisory Board [Member]
Professional and Contract Services Expense, Total	$ 34,000	$ 0

Professional and contract service expense includes cost reimbursements for support services related to contracted projects, outsourced management, technical and staff support.

No definition available.

Name:	us-gaap_ProfessionalAndContractServicesExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration