Note 2 - Summary of Significant Accounting Policies - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net income (basic and diluted)	$ 1,023	$ 533	$ 2,108	$ 1,061
Weighted average shares outstanding (in shares)	37,882	37,816	37,860	37,816
Basic (in dollars per share)	$ 0.03	$ 0.01	$ 0.06	$ 0.03
Weighted average shares outstanding (including dilutive CSEs) (in shares)	38,422	38,049	38,344	38,048
Diluted (in dollars per share)	$ 0.03	$ 0.01	$ 0.05	$ 0.03