Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2014			2013			2012
Federal statutory rate		34.0	%		34.0	%		34.0	%
State taxes, net of federal tax benefit		5.5			5.9			5.9
Recapture of alternative minimum tax	–			–			–
Valuation allowance		(39.5	)		(39.9	)		(39.9	)
Effective tax rate		–	%		–	%		–	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
In thousands	2014			2013
Net operating loss carry forwards	$	61,536		$	53,423
Compensation expense related to employee stock options		4,235			3,310
Subtotal		65,771			56,733
Valuation allowance		(65,771	)		(56,733	)
Total deferred tax asset	$	-		$	-

Summary of Operating Loss Carryforwards [Table Text Block]

Approximate Amount of Unused Operating Loss Carry Forwards (in $000s)		Expiration During Year Ended
$	5,003		2022
	2,292		2023
	15,655		2024
	8,174		2025
	7,367		2026
	10,716		2028
	14,300		2029
	18,045		2030
	21,386		2031
	20,558		2032
	10,319		2033
	21,896		2034
$	155,711