Note 2 - Summary of Significant Accounting Policies - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net income - basic and diluted	$ 1,787	$ 1,085
Weighted average shares outstanding (in shares)	56,824	37,837
Net income per share – basic (in dollars per share)	$ 0.03	$ 0.03
Weighted average shares outstanding (including dilutive CSEs) (in shares)	58,048	38,269
Net income per share – diluted (in dollars per share)	$ 0.03	$ 0.03