Note 9 - Leases - Lease Assets and Liabilities (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset	$ 9,725,871
Other current liabilities	659,830
Operating lease liabilities	9,157,675
Operating Lease, Liability, Total	$ 9,817,505
Operating Leases (in years) (Year)	13 years 182 days
Operating Leases	5.00%