Note 9 - Leases - Future Minimum Capital Lease Payments (Details)	Dec. 31, 2017 USD ($)
Minimum lease payment, 2018	$ 65,142
Interest, 2018	9,407
Present value of obligation, 2018	55,735
Minimum lease payment, 2019	61,573
Interest, 2019	6,017
Present value of obligation, 2019	55,556
Minimum lease payment, 2020	49,327
Interest, 2020	1,895
Present value of obligation, 2020	47,432
Minimum lease payment, 2021	3,888
Interest, 2021	21
Present value of obligation, 2021	3,867
Minimum lease payment, 2022
Interest, 2022
Present value of obligation, 2022
Minimum lease payment	179,930
Interest	17,340
Present value of obligation	$ 162,590