Note 11 - Subsequent Events (Details Textual) - Office Space, Executive Offices and Operations [Member] - San Antonio, TX [Member] - Subsequent Event [Member]	Oct. 19, 2021 USD ($) ft²
Operating Leases, Area Leased (Square Foot) | ft²	6,628
Minimum [Member]
Operating Lease, Annual Expense	$ 135,874
Maximum [Member]
Operating Lease, Annual Expense	$ 145,816