Note 5 - Income Taxes (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Income Tax Expense (Benefit)	$ 0
Valuation Allowance Percentage	100.00%
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 32,600,000	$ 30,900,000
Operating Loss Carryforwards, Valuation Allowance	11,000,000	10,700,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	13,600,000	13,000,000
Operating Loss Carryforwards, Valuation Allowance	$ 200,000	$ 200,000