Note 11 - Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2012

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted average outstanding options		4,069,207		3,908,305		3,887,366		3,905,988
Weighted average outstanding warrants		3,013,643		2,331,917		2,309,978		2,412,427