Note 15 - Income Taxes (Detail) - Income Tax Expense (Benefit) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 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	$ 0	$ 0	$ 0