Note 11 - Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Weighted average outstanding options		3,974,642		3,368,522		3,916,671		3,724,864
Weighted average outstanding warrants		2,904,769		1,793,530		2,509,937		2,203,861