Note 13 - Commitments - Lease Expense (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Operating lease cost	$ 39,554	$ 79,109
Total lease cost	$ 39,554	79,109
Operating cash flows from operating leases		79,109
Right-of-use assets obtained in exchange for new operating lease liabilities
Weighted-average remaining lease term - operating leases (Year)	21 days	21 days
Weighted-average discount rate - operating leases	9.20%	9.20%