Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

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

	2015			2014			2013
Federal statutory rate		34.0	%		34.0	%		34.0	%
State taxes, net of federal tax benefit		5.5			5.5			5.9
Recapture of alternative minimum tax		–			–			–
Valuation allowance		(39.5	)		(39.5	)		(39.9	)
Effective tax rate		–	%		–	%		–	%

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

	December 31,
In thousands	2015			2014
Net operating loss carry forwards	$	71,557		$	64,021
Compensation expense related to employee stock options		4,953			4,235
Subtotal		76,510			68,255
Valuation allowance		(76,510	)		(68,255	)
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
$	4,843		2022
	2,293		2023
	15,647		2024
	8,168		2025
	7,361		2026
	11,905		2028
	18,547		2029
	18,145		2030
	21,386		2031
	20,558		2032
	10,321		2033
	22,906		2034
	19,078		2035
$	181,158