Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Computation of basic and diluted net income per share
Net income	$ 273	$ 551	$ 276	$ 1,154
Basic weighted average shares outstanding	48,793	44,954	47,529	44,827
Effect of potentially dilutive securities	4,951	2,696	4,768	2,674
Diluted weighted average shares outstanding	53,744	47,650	52,297	47,501
Basic net income per share	$ 0.01	$ 0.01	$ 0.01	$ 0.03
Diluted net income per share	$ 0.01	$ 0.01	$ 0.01	$ 0.02