Note 11 - Commitments and Contingencies (Details Textual) - USD ($)	May 02, 2017	Dec. 30, 2015	Mar. 31, 2018
Consulting Services, Monthly Payment		$ 23,438
Consulting Services, Period of Services		4 years
Contractual Obligation, Total			$ 1,125,024
President and Chief Executive Officer [Member]
Employment Agreement, Annual Base Compensation	$ 288,603
Employment Agreement, Car Allowance Monthly	$ 800
Employment Agreement, Option, Number of Shares, Expected to Grant	3,731,322
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Employment Agreement, Common Stock, Expect to Grant, Subject to Lock-Up Agreement	1,500,000
Employment Agreement, Lock-up Agreement, Successful Commercialization, Minimum Cash Receipt	$ 3,000,000
Employment Agreement, Lock-up Agreement, Minimum Revenue Recognized	$ 3,000,000
Employment Agreement, Term	5 years
President and Chief Executive Officer [Member] | Non-Qualified Stock Option [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0.45