Note 10 - Leases - Lease Assets and Liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Right-of-Use Asset	$ 8,856,820	$ 9,224,840
Operating Leases (in years) (Year)	9 years	11 years
Operating Leases	5.00%	5.00%
Other Current Liabilities [Member]
Other current liabilities	$ 1,136,300	$ 850,664
Operating Lease Liabilities [Member]
Operating lease liabilities	7,901,357	8,513,448
Other Current Liabilities and Operating Lease Liabilities [Member]
Operating Lease, Liability, Total	$ 9,037,657	$ 9,364,112