Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	20 17			20 16
Federal statutory rate		34	%		34.0	%
State taxes, net of federal tax benefit		6.6			5.5
Change in v aluation allowance and deferred rate change, net		(40.6	)		(39.5	)
Effective tax rate		–	%		–	%

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

	December 31,
	201 7			2016
Net operating loss carryforwards	$	62,216,000		$	81,335,000
Other Deferred tax assets, net		2,415,000			2,714,000
Subtotal		64,631,000			84,049,000
Valuation allowance		(64,631,000	)		(84,049,000	)
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 End ing
$	7,136		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
	21,338		2035
	22,495		2036
	19,509		2037
$	225,422