Note 15 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2012			2011			2010
U.S. federal income tax at statutory rate	$	(3,505,000	)	$	(4,340,000	)	$	(2,261,000	)
Nondeductible expenses		69,000			113,000			2,000
Exercise and forfeitures of stock based compensation		(383,000	)		(1,298,000	)		(290,000	)
Change in valuation allowance		2,869,000			5,261,000			2,919,000
State tax benefit, net of federal provision (benefit)		(428,000	)		(677,000	)		(383,000	)
Foreign subsidiary loss		673,000			419,000			14,000
Adjustment for business combinations		704,000			522,000			-
Other		1,000			-			(1,000	)
Income Tax Expense	$	-		$	-		$	-

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

	December 31, 2012			December 31, 2011
Net operating loss	$	50,515,000		$	48,820,000
Property and equipment		(2,447,000	)		(2,999,000	)
Stock options and warrants		7,960,000			7,916,000
Other		1,269,000			691,000
Total deferred tax assets		57,297,000			54,428,000
Valuation allowance		(57,297,000	)		(54,428,000	)
Net deferred tax assets	$	-		$	-