Note 9 - Acquisition (Details) - Pro Forma Information (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pro Forma Information [Abstract]
Total revenues	$ 13,335	$ 10,772	$ 37,459	$ 28,663
Net loss	$ (5,987)	$ (3,508)	$ (15,707)	$ (6,204)
Net loss per share—basic and diluted (in Dollars per share)	$ (0.35)	$ (1.50)	$ (0.91)	$ (2.75)
Weighted average shares outstanding—basic and diluted (in Shares)	17,333,441	2,331,990	17,300,881	2,256,494