Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

	December 31, 2013			December 31, 2012
Net operating loss	$	48,280,000		$	50,515,000
Property and equipment		(1,525,000	)		(2,447,000	)
Stock options and warrants		9,738,000			7,960,000
Other		1,151,000			1,269,000
Total deferred tax assets		57,644,000			57,297,000
Valuation allowance		(57,644,000	)		(57,297,000	)
Net deferred tax assets	$	-		$	-

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

	2013			2012
U.S. federal income tax at statutory rate	$	(3,689,000	)	$	(3,505,000	)
Nondeductible expenses		54,000			69,000
Exercise and forfeitures of stock based compensation		-			(383,000	)
Change in valuation allowance		3,708,000			2,869,000
State tax benefit, net of federal provision (benefit)		2,000			(428,000	)
Foreign subsidiary loss		(22,000	)		673,000
Adjustment for business combinations		-			704,000
Other		(53,000	)		1,000
Income Tax Expense	$	-		$	-