Note 11 - Leases - Components of Operating and Finance Leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating lease cost	$ 1,601,678
Operating leases, weighted average remaining lease term (Month)	4 years 90 days
Operating leases, weighted average discount rate	4.00%
Amortization of right-of-use assets	$ 571,130	$ 275,163
Interest on lease liabilities	110,274	51,637
Total finance leases cost	$ 681,404	$ 326,800