Note 12 - Subsequent Events (Details Textual) - Subsequent Event [Member]	Feb. 06, 2019 USD ($)
Contingent Salary and Compensation, Retention Agreement	$ 1,500,000
Chief Executive Officer [Member]
Contingent Salary and Compensation, Retention Agreement	1,000,000
Chief Financial Officer [Member]
Contingent Salary and Compensation, Retention Agreement	$ 250,000