Note 5 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Property, plant and equipment, gross	$ 6,914,657	$ 6,914,657
Less – accumulated depreciation and amortization	(5,721,420)	(5,582,949)
Property, plant and equipment, net	1,193,237	1,331,708
Leasehold Improvements [Member]
Property, plant and equipment, gross	2,420,028	2,420,028
Computer Equipment [Member]
Property, plant and equipment, gross	468,937	468,937
Furniture and Fixtures [Member]
Property, plant and equipment, gross	347,045	347,045
Operating Lease Right of Use Assets [Member]
Property, plant and equipment, gross	$ 3,678,647	$ 3,678,647