Note 5 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Valuation Allowance Percentage	100.00%
Income Tax Expense (Benefit)	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards		$ 30,900,000	$ 31,400,000
Operating Loss Carryforwards, Valuation Allowance		10,700,000	11,000,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		13,000,000	13,200,000
Operating Loss Carryforwards, Valuation Allowance		$ 200,000	$ 200,000